How to take multiple integer inputs in java using for loop. hasNextDouble()) { System.

How to take multiple integer inputs in java using for loop The homework problem is to write a while loop that prompts the user to enter as many integers as they want and to type "q" when done, then print the sum of those integers and the number of entries. println("Please enter a number Following that, we use a for loop to accept user input and save it in an array. 23 1 1 silver badge 3 3 bronze badges. "); number = input. put(2,"Love"); map. The API has examples and there are many I need to read an unknown number of inputs using either C++ or Java. ie: If they enter 1 In the single-line input case, it’s pretty straightforward to handle. To work around this situation you could introduce a variable to hold the value for the second check: int tmp; while (scaner. Scanner kybd = new Scanner(System. com/watch?v=CIoErdaC7o4Improves java versio I'm new to Java and I wanted to keep on asking for user input until the user enters an integer, so that there's no InputMismatchException. nextLine(), as the name suggests, reads a single line. However, sometimes we may want to read multiple inputs on In Java, I am having trouble running multiple loops using a single sequence of user-inputted integers. Then add a line System. For example: Scanner scanner = new Scanner(System. String s = sc. Output: Explanation: In this example, first we use the Scanner class to accept user input and save the array size in the size variable. Make sure it imported in java. Ask Question Asked 10 years ago. An infinite loop occurs when the loop’s condition never becomes false. The following table lists the methods used to take multiple inputs of different types from the user in a Java program. This question already has answers here: Why does my ArrayList contain N copies of the last item added to the list? (5 answers) Closed 6 years ago. Issue: In your code the two variables you have input and number (which should rather be named sum) are solving very different purpose. Use readLine() method of BufferedReader and scan the whole String. Below is my code but my question is that is there a shorter way for this? feel free to comment and i appreciate your time reading this. If you call it on an array of Integer or other reference type then it will work also. I would recommend using this regex to check if the input is an int or String Using a for loop to take user input in Python; While loop with user Input in Python # Using a for loop to take user input in Python. I was to make a for loop that repeats 5 times. input is acting a transient pedestrial where the user-entered values come and land. I want to read all these data in an integer array. Once you have stream of String array elements, you can use mapToDouble(s -> Double. This approach provides flexibility and works well when we know the number of elements we need to input. readInt() three times instead of using . nextDouble(); but whilst this stops you repeating the sc. To calculate the sum you need to declare a variable out of the for loop scope. And according this this induvial class using StringBuilder is incredibly more efficient than concatenate. hasNextInt()) { to loop of multiple input values from a single line of input You can check the documentation for Here is one way to take user input in Eclips. The call of scanner. I would use an array BUT I am not allowed. The only trouble with that code is that if the user enters just 1 value, then they have to re-enter all 4 values on the next cycle Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Visit the blog I'm trying to allow the user to put in multiple inputs from the user that contain a char and integers. To multiply two variables, it's as simple as. nextDouble()s, you have to introduce the loop gubbins instead. Here is a VERY simplistic demonstration - you should use getters and setters and you should also use a List instead of an array but this demonstrates the point:. Java has a StringBuilder class, super easy to use. Don’t forget to break the loop based on input. Need to take input 1 2 3 or of any length separated by space then break it into separate integers. We use the variable element "e" to access each value in the array, making the loop more concise compared to using a traditional for loop with an index. Stack Overflow. Scanner has many hasNextXXX methods that can be used to validate input. so declare a variable say sum and after each input add price to sum. I'm writing a short program to prompt the user for numeric inputs, which I will then test to see if they are negative and report back which ones pass this test. Scanner; I just want the program to ask the user for the series of numbers they want to input. parseDouble(s)) which will convert stream of Strings into stream of But I don't want to use input function multiple times. hasNextInt() && (tmp = scaner. You must import java. So your code would look something like this. If you immediately type a correct int, the flow is this: main ask for input -> int print i (1) But in your case the input is not an int. ) You need to make three iterations and for such scenario, the best thing to use is a for loop. Here’s a step-by-step guide on how to achieve this: Initialize an empty list to store the inputs. You can do this using Arrays. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company You are seeing outputs for each input because you call main recursively. About; Products OverflowAI; Stack Overflow for Teams Where developers & technologists share private knowledge with I'm working on getting a little better at Java, and a problem I've run into is taking user input, all in one line like this: System. in); //start a loop for insert the numbers //the array will start counting from num[0] -> num[size - 1] so This is a simple use of an if statement. Modified 8 years, 7 months ago. The rest are collected one line at a time only if you hit I am creating a java program which prompts user for the number of items in an array (a non-negative integer), reads it, and saves it in an int variable. If they get the number right I want to give them the option to play again. About; Products OverflowAI; Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; So when you press enter after inputting an integer, next call to nextLine() consumes the new line character which wasn't consumed in the last iteration of the loop by nextInt() method. Input Example: NY 15. You must also call your scanner object's nextLine() method to clear Below is the sample program using this method. To use a for loop to take user input: Declare a new variable and initialize it to an empty list. That's the reason your code is ignoring the inputted value the first time. Java Infinite for Loop . We read the input until we see the line break. This is what happens: you type the first input, it fails. Add a comment | 2 Answers Sorted by: Reset to default 3 . Find centralized, trusted content and collaborate around the technologies you use most. One way to read multiple inputs on the same line is to use a space as a delimiter. Same for minimum. C# version: https://www. Jonathan Graehl Jonathan Graehl. java. In the for loop, we have to make sure that we terminate the loop after 10 iterations, or if the input stream does not have any more int's. in); for (int changeMoney = -1; (changeMoney = kybd. That way you can put your input like this 1 2 3 and after pressing Enter on the keyboard (which is by default used to end the input) you get what you were asking for. Returns true if the next token in this scanner's input can be interpreted as an int value in the default radix using the nextInt() method. You're already doing this in the expression in. May I request Methods for Taking Multiple Inputs Using Scanner. Individually, they run fine individually but together it prints out incorrect numbers. length); i++) { salespersons[i] = values[i]; } In Java, there is no direct method to take array input from the user. I want to get input and multiply the input and display results. The exercise consist of receiving multiple pair of radius and height at once. nextInt(); } This way it will keep asking them to input a number until the number they input is greater than 0. Also we can take inputs separated by custom delimiter which is comma in the below example. x; list; Share. Like : BufferedReader br = new BufferedReader(new FileReader("input1. nextLine(); // reads the single input line from the console String[] strings = line. length,values. Follow edited Sep 24, 2017 at 17:54. Using Scanner Class and Loops for Two Overview of Scanner. If your intention was to get an output in one line instead of multiline one, you should use other version Note: To know more about Nested loops refer Nested loops in Java. max(c,Math. nextInt(); int num2 = scanner. Scanner; public class Main { Skip to main content. nextInt()) > 0 Im still starting out in java - and any guidance would be great on this. I have tried array, Strings and CharAt(), string. 0. parseInt will generate if you try and parse a none-numerical value. Code to test Also you're creating your instances in your while-loop. Following that, we use a for loop to accept user input and save it in an array. nextLine(); If you need to read multi-line text, you need to workout a strategy for doing this such as reading everything in a loop until you have a blank line. You could also use a while (check. But Java provides two simple ways using which we can take array input from the user. parseInt(); The above method was tested to parse 1000 different integers and was proved to be twice as much faster then using nextInt() method of Scanner class. nextInt(); just sets m to whatever the input is, and adds nothing to the array. In the below program, the syntax and procedures to take the integer as input from the user are shown in Java Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company You could first create an array, using input from the user to specify how many indexes: int n = scanner. Skip to main content . println("Number of guesses:"+count); under your loop. From there the value is added into number and then come another user-entered value which lands onto the same pedestrial thereby knocking Do I need to use a for loop? java; Share. max(int, int) to find the smallest and largest respectively. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company You don't need to change originalNumber at all - just multiply i by originalNumber: int originalNumber = 1; for (int i = 1; i <= 10000; i++) { int multiple = originalNumber * i; // Use multiple however you want to } To get all the multiples of 2, you'd set originalNumber to 2, etc. Learn more about Collectives Teams. so my homework question is prompt user a series of integers and find the max and min of those integer. length; i++) {and assign Or you can use the facilities of the Java standard Math package, where Math. nextInt() in this To get integer inputs in a loop, respond to an "exit" value, and guard against invalid inputs, I would use something like the template below. How to switch to parallel stream? * I'd like to keep the reference to i. max(d,e)))); Here, you define the largest of all five numbers as the maximum of the pair {a, maximum-of-bcde} then use a similar method to work How to Take Multiple String Input in Java Using Scanner. scanner. For example Enter n Skip to main content. For more number of inputs we can use a loop: import java. charAt(0). The output looks like this: Enter a letter grade for your class (the letter you enter ex. max(a,Math. parseInt(brstring); double number = Double. next(); only returns one token (e. That's why it skips the input of String in the next iteration of the loop and does't waits for the user to input a String. BufferedReader basically takes a input stream as an argument. Below is example how you can use a BufferedReader to read the input of file. User[] users = new User[UserInput] and in your while-loop you can check for the input and do the following You can't do this: println("He played knick-knack on my" + switch(n)); if you want your code largely the same, you should delegate to a method performing the switch. You are checking here what the user typed but then not using it at all and storing the next thing that the user types by saying: myArray[i] = scan. Method: Inputs: nextInt() Integer: nextFloat() Float: nextDouble() Double: nextLong() Long: nextShort() Short: next() With the integration of JEP 361: Switch Expressions in Java 14 and later, one can make use of the new form of the switch label using a comma between multiple values. length; i++) numbers[i] = sc. Sample Data. The scanner does not advance past any input. Next, we set a value for your maximum - since integers can be negative, we can not use 0, but have to use the smallest possible integer. I'm basically hoping to create an array, then assign values to that array in a for loop. Connect and share knowledge within a single location Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company I want to run an interactive program where a user is prompted to enter a number of students. Here’s an example: int num1 = scanner. You'll probably learn more about it, just wanted to The Scanner class is a useful tool in Java for reading inputs from the console. nextLine(); is your problem. Standard Scanner should work, maybe there is another problem in this case but I don't believe it is possible to say from this information. Any input would be helpful. Viewed 2k times 0 . Scanner; // enter the before the start of any class // declare the class here // this is an example of how to use the Scanner in a method Public static void Username();{ Scanner Input = new scanner (System. in); String line = scanner. nextDouble(); After that, loop again and multiply each number: Why not use Map and store index as key and value as String that you want to consider. Also, don't perform integer math for determining the average. When you enter two words it doesn't need receive more input from the user before continuing a second time because it already has another word to return. in. In order to store the user inputs, you need an array in which you store the values with the index of the current position in the for loop. The code I have at the moment is: So I'm trying to read all the input from one line, using scanner, then take the values and find the second largest. You are supposed to enter 10 integers, hit enter and evaluate them. Let’s start with a basic way to input a list using a for loop in Python. Note that something critical that none of the answers so far has mentioned is that it is not good enough to simply catch InputMismatchException. 8. We can use loops along with the "Scanner class" or "BufferedReader Use While True to take multiple inputs in Python using a while loop. It then prompts user for the values of all the . I was thinking I could have the first input as a character and then read the rest as a string which then I separate and put into an array. I am using BufferedReader class to read inputs in my Java program. But if you did want to do that, you should use an indexed for loop: for (int i = 0; i<Math. and it prints the maximum and minimum of the integer ignoring the negative. You have to use in-built methods to parse string into ints and doubles. The answer by mauris uses Scanner#nextInt and works if you are willing to change your input requirement such that the last entry is not an integer. You could store all of these inputs in a list called inputs using You don't need to assign it to an intermediary values variable, and then loop over it to assign it to salespersons. ; Also it seems that your if should be replaced with loop if you want let user to write another number again. I want to keep requesting user input until the user inputs the number 0, here is the code I have so far: import seems like a homework . Set up a The problem was that you did not advance the Scanner past the problematic input. Explore Teams. hasNextInt()) sc. Each time it asks you to enter a grade, takes your input using System. Use a loop and -99 to break loop. I tried working with the scanner class however when i tried for 800000*3 inputs, it took around 12. There may be some times when you'll need to call nextLine() without saving the input just to handle the EOL token. Below, are some of the ways to take multiple inputs In Python Using Loop: Using a List and For Loop The given task is to take an integer as input from the user and print that integer in Java language. class Student { String name; int mark; } Student[] students = new Student[10]; for You can use java. What you want to do is call reader. However the problem that arises from this is that now you have a whole sentence of text, which is actually a mathematical term. Scanner scanner = new Scanner(System. Here's a brief overview of all of them: hasNext() - does it have any token at all? hasNextLine() - does The answer by Makoto does what you want using Scanner#nextLine and String#split. To use the Scanner class, create an object of the class and use any of the available Here are some commonly used methods to take input in Java: The Scanner class is a versatile way to obtain user input. split("\\s"); Iterate over the above array and parse each integer value using Integer. And you can use break to terminate a loop. Java - Adding multiple user inputs into arraylist. Imagine we are developing a program where a user needs to input multiple integers in a single line, separated by spaces. When the user finishes the 5 question I want there to be a total at the end. nextLine(); The reason it loops twice is because scanInput. You have to maintain a variable to keep track of lowest value entered and compare every input to it, if it is lower you replace it with the value new value. If you want to read multiple words, the simplest solution is to read a line of text. Nate123 Nate123. Using Scanner Class and Loops How to input multiple values from user in one line in Java - To input multiple values from user in one line, the code is as follows −Example Live Demoimport java. Fixing the indentation goes a long way toward making it readable for others. If both numbers are contained on this single line, you should read both integers from that line. What you had already was fine. next(); int num1 = sc. For saving multiple users you could use an array. stream(<arr>). It allows us to take multiple inputs from the user one by one and store them in a list. Problem Statement. And I have already tried the alternative keyword next() it only prints the first word and because of a space it stops. The code seems to still take in the values at different lines. If i want to get 2 times the input, the loop gets twice but prints only once. (It looks more ugly in Java, since we have no operator overloading, and no autoboxing from int to our DecimalBigInt type. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company If you take a look at the Javadoc for Scanner, there is a nextInt() method, which will do the same thing as nextLine() but return an integer. The same problem occurs with ZIP codes in the US -- ZIP codes are 5-digits and get bigger as you go from North to South and East to West. once in condition, second inside your if statement. This is true of all hasNextXXX() methods: they return true or false, A user wants to input data like below and save N as list of integers and B as a list of strings. In this tutorial, we’ll address how to handle In C, we use scanf to take input from the user, and often it is necessary to take multiple inputs simultaneously. which i have to read some integer numbers from several text files and store them in these variables. Either way here is the code without the loop taking in the inputs with the white space: /* Class: CS1301 * Section: 9:30 * Term: Fall 2015 * Name: Matthew Woolridge * Instructor: Mr. 1. println("Enter First Number: "); while (!input. The specific issue is on 5th line. e. PIN, postal codes, and telephone numbers should be treated as strings and never as an integer. Just adding this in here since you stated you're learning. youtube. After checking how many Users you want to insert you could create an Array. Viewed 3k times 1 . min(int, int) and Math. In this section, we will learn how to take multiple string input in Java using Scanner class. split(" "); // splits the string wherever a space character is You're calling reader. Scanner : import java. In this tutorial, we'll dive deep into Java's Scanner class, primarily focusing on how to handle integer input. Sometimes, we require multiple user inputs during the loop run while working with loops. case text1, text4 -> { //blah } How can I use new Java 8 stream API to be able to do this without the for? Also, the use of the stream would make it easy to switch to parallel stream. Desired Output: exampleList = [2,3,5,4,1] python; python-3. I'm looking for a method that avoids You are asking user for number twice. In this article, we will explore simple and commonly used methods to take multiple inputs in Python using loops in Python. About; Products OverflowAI; Stack Overflow for Teams Where developers & technologists share private knowledge with Explanation: In this example, the for-each loop iterates over the array “ arr" and prints each element. in); System. Scanner; // Scanner in = new Scanner(System. java; Use for loop and array that'll contain the data: String[] inputs = new String[NUMBER_OF_INPUTS]; Scanner scanner = new Scanner(); for(i=0; i<NUMBER_OF_INPUTS; i++) { inputs[i] = scanner. Input format- the user first enters how many numbers he/she want to enter. 8) Remember to close the `Scanner` object after you have finished reading input from the user to release system resources by calling the `close()` method: ```java. Ask Question Asked 7 years, 1 month As you can see I am just scanning one input from the user as i'm not sure how to tackle storing infinite input. Input: 2 hello world 3 how are you 5 what are you doing man Then I want to save these two lists like . The only 7) If you want to read multiple integer inputs from the user in a loop, you can use a while loop or for loop and repeatedly call `scanner. Do you specifically need to assign values within a foreach loop?. hasNextXXX methods. How to take multiple integers as single input separated by space in java, then break them into integers? Ask Question Asked 8 years, 7 months ago. 9,292 37 37 silver badges 40 40 bronze badges. nextInt() returns an int from your standard input so you actually have to pick up that value. In your case, you want to convert args which is String[] into double or int. We often use the next() or nextLine() methods to read each input on a separate line. I would like to show how to get Scanner#nextLine to work with the exact input condition you gave. where NY represents the prov If your goal is to read an int input by the user, you can use Scanner: Scanner sc = new Scanner(System. nextLine() if you are trying to read a string immediately after. Furthermore, I am using for loops for my two equations. Viewed 14k times 1 . int[] x = { 1, 2 }; print(x); Because Java takes T to be int[] and will execute the toString method of the array rather than iterate through the contents. in); for (int i = 0; i < 3; ++i) ds[i] = sc. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Input arraylist using loop [duplicate] Ask Question Asked 6 years, 6 months ago. readNextLine(). Follow asked Mar 18, 2020 at 14:36. Next, we use the So, below in my code, I want to input a string but without using the function nextLine() and I need to print the whole statement with statement. max(a,b) will give you the largest of the values from a and b:. However, my for loop doesn't seem to be working correctly. nextLine() after the . 0xgareth 0xgareth. parseDouble(brstring); You can also use List<Integer> int[] num = new int[size]; System. Take a look at this example I built on your code: So basically I have a for loop and I am trying to get it to run x amount of times. To take multiple inputs from users in C, we can declare an array to store the user input and repeatedly call the scanf() function within loop to Scanner. Modified 11 years, 9 months ago. int[] arr = new int[3]; sets up an array of 3 0s. 38 seconds. In this case you can use something like. Inputs have exactly two numbers per line. print("Enter number 1: "); while (!sc. readLine(); //more logic here int number = Integer. println("Insert 10 integer numbers:"); //use Scanner class for better data input. nextInt(); If you need the value of an int that changes inside a loop after the loop is finished, declare the int before the loop: int a; Just add one incrementation into your do while loop count = count + 1; as the last command. The scanner does not advance past any input. I'd need to use cin or a System. close(); ``` First, we create the scanner. println("Please input numbers that you would like to work with"); //Read in user input into ArrayList, taking into How can we take n input in java according to value of T Like if i take t=2,then we take two n input If value of t=3,then we take three n input import java. read();, then says what you entered. nextInt()) != 0;){ I write a program and need to generate results for different input (integer) values. It is part of the java. We must import the package before using the Scanner class. Finally, we use another for loop to print the array’s elements. Robert Thorsen * Assignment: 4 * Program: 1 * ProgramName: ISBN_Number * Purpose: Prompts the user to enter the first nine hasNextInt avoids the possible exception that Integer. About; Products OverflowAI; Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; I want to get only BigInteger from scanner input of Java, but loop exceeds it's limit. Something like this as input: A 26 16 34 9 and output each int added to an array. nextInt(); int[] numbers = new int[n]; for (int j = 0; j < n; Multiple integer read in java with bufferedreader in java. From hasNextInt() documentation:. Thanks. Use a scanner and take the input as a string using a loop (as you want several lines consisting of strings and integers), further within the loop split the string to array and I am writing a simple guessing game program where the user will input a number to try and guess a randomly generated number. Q&A for work. class Point { double x; double y; public String toString() { return x + " " + y; } } class Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Since our input strings are big-endian, we don't have to count down, but can use a simple enhanced for loop. nextInt(); } In this article, we explored different ways to read multiple integers from a single line in Java, including using the Scanner class with a loop and streams, and the In this article, we’ll explore how to read multiple integers from one line written in a file. This is because, when you parse a number, leading zeros are removed. a) Grade entered = a how to take more inputs from user using Nextline() in java if i use scn. Stack Overflow . About; Products OverflowAI; Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about So let's begin with some general code review items: The code is not formatted well, which makes it hard to read. . Ask Question Asked 11 years, 9 months ago. It would work anywhere in the do loop, but it's logical to put it after the input was processed. in); int t= scanner. You need to use List or String[] instead of simple String object to return multiple Strings out of a function , also the if condition needs to be part of the for loop and you need to add the result in the List or the array , below is the expected output using List. 2. in Scanner because input comes from the console, not f Taking list as input using a for loop is a simple and commonly used method. Is there a way for the user to input both the name and the degree all in one input and store them as two different values, or am I going to have to have two separate input dialogs? Example: storing the name as "Name1" and the degree as "Degree1 in order to calculate I have been trying to figure out how calculate the area and volume based on the input obtain from the Scanner Class. Nextline() after reading one input it will work but giving a null in answer. nextInt(); You don't really need the outer while loop, just use the for loop, its enough. I'm not new to coding Your solution does this allready! If you go through the documentation of scaner you will find out that your code works with different inputs, as long they are integers separated by whitespace and/or line seperators. I understand that this code is making the . After this loop ends youre Instances will be gone. You can declare multiple int variables by using a , and I would use ++ and += to make the code more idiomatic. Viewed 20k times 1 . I can't say I am %100 sure of the problem, but I'll share what I usually do. Scanner; Scanner scan = new Scanner(System. The total of all the user inputs (u Introduction. But I need to print the whole statement. Since depending on the command entered by the user, the number of inputs you accept from the user changes, try using loops inside the if or else conditions. Share. Use Your program should read the input as an integer. if (i == 0) { System. . Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company In this article, we will explore how to read and process multiple integers from one line of input using several approaches, including Scanner, BufferedReader, and Java Streams. The issue I am having is how to get the user input and also make sure that its a . I tried taking it out, and both the average and output for "Enter the numbers" turned to 0. Take Multiple Inputs Using Loop in Python. In the example below, the condition i >= 1 always So might help everyone who want to do it using Java 8 features. Scanner Scanner scanner = new Scanner(System. for (type var : array) {statements using var;} Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company I would like to know how to store user input using a variable when using a For Loop. In Java, Scanner is a class that provides methods for input of different primitive types. nextInt(); No problem. This is what I have so far It doesn't work if the user inputs more than one integer and I don't know why. In this article, we will learn about how to take multiple inputs from the users in C. public class Mapdemo { public static void public class Mapdemo { public static void I want the input to take in both the prov and tax on the same line despite them being different data types. You can set that to an integer variable. nextLine() only once, and check that value for your exit condition. Solution Using a for loop can simplify the process and make the code more efficient. Improve this answer . hasNextDouble()) { System. It is defined in java. next(); with sAwayTeam = scanInput. nextInt(); In this example, we use the nextInt () method to read two Java User Input. I do not want it to output multiple "Enter the numbers". Is there a way to have continuous input in the same program once it runs? I have to keep running the program each time to enter a number. nextLine() just after reading the integer values, if you hit "enter" after the integer, the nextInt() would consume only the integer value and ignore the carriage return, which will be consumed by the . Putting that together might look like Learn more about Labs. println("Enter an integer " + "greater than 0. 621 1 1 gold I'm trying to get this loop to repeat so the integers the user enters will multiply together. ; Split this String for str. , 0123 would be parsed as 123. out. in); int num = in. in); int a[] = new int[n]; //where n is the number of inputs for(int i=0;i<n;i++){ a[i] = scan. Collectives™ on Stack Overflow. nextInt() advances the position at which the scanner reads its input, so the second read may produce a different number, or throw an exception when there is only one int available. Try to learn and do by yourself with the help. Python3 Let me tack on one thing about arrays then just so you know. lines(), for a scanner example look at the other answer. Map<Integer,String> map = new HashMap<Integer,String>(); map. Thank you. put(3,"Dogs"); The loop is just to demonstrate that scanf returns the number of fields succesfully read (or EOF). Teams. If not, then just assign a position in the array using a standard for loop to do it this way -> for (int i = 0; i < arr. in); String username// declaring the username variable Scanner un = new Scanner(System. Skip to main content. One way is to take the whole line as input and get the integers from it but am looking for something faster. I also tried tried to work with the BufferedReader which Explaination. It's not an issue in your For java practice, i am trying to create a program that reads integers from the keyboard until a negative one is entered. Just add an extra . You can use ArrayList<int> and that is a DYNAMIC (can change after initialized) array that is a class and can change the size of the array as you go. StringBuilder vs String concatenation in toString() in Java This is a homework problem How would I reverse an integer in Java with a for loop? The user will input the integer (I don't know how long it will be) and I need to reverse it. If the user inputs a letter or other character besides a whole number, they should be asked again ("Enter the number of students: ") You can use Math. If you don't actually need them in separate variables, you could use an array: double[] ds = new double[3]; Scanner sc = new Scanner(System. We also included error handling to for (int i = 0; i < n; i++) { // Begin For Loop. I'm doing lottery game for my assignment (user inputs 6 number, i will generate 8 unique winning numbers and 2 last numbers are supplementary). Using List Comprehension (Multiple Inputs in One Line). Whether you are building a console application or a more extensive system, understanding how to take user input effectively can make your application I'm creating a program that allows us user to input multiple int values in single line and store it to stack. If we want to ask the user for multiple values on a single line, we can use list comprehension combined with the input() function and split() to break the input into individual components. java; arraylist ; Share. Syntax of For-each Loop. Follow asked Nov 23, 2017 at 17:09. I want to read inputs from a user who can enter multiple integer data in single line with space. The underlying problem is actually that you should tie both of the arrays together and iterate across just one array. In this example, the code prompts the user for an integer input, then iteratively takes that many additional integer inputs to form a list, printing the resulting list of numbers. Learn more Explore Teams. This could be a rather long lesson in bit manipulation but first let me point you too the bit masking article on Wikipedia. Ask questions, find answers and collaborate at work with Stack Overflow for Teams. int largest = Math. I've tried this code, but I still get the exception when I enter a non-integer value. Then we make an array arr with the size s. We’ll explore the standard Java packages, specifically BufferedReader, and Scanner to achieve our desired result. Using for loops to get multiple user input based on a value specified by the user. choice ; numofNodes; numofPoints; in each file there might be multiple numbers that should be assigned to one of above variables, for example: int number = 0; // start at 0 so the while loop is true for the first time while (number < 1) { System. util package. Chris. You do not print yet because you first call main again, asking for the next input. next(). The Scanner class is used to get user input, and it is found in the java. Input and output are fundamental operations in any programming language, and Java is no exception. However, we need to manage multiple-line user input in a different way. And then multiple integer values in the next single line I've tried a couple of things with the while loop and can't seem to get it to work. asked Sep 24, 2017 at 16:57. Below are some of the examples by which we can understand how we can use for loop for user input in Python: Example 1: Taking User Input Using for Loop. split() method but they Enter integer: a invalid input Enter integer: invalid input Enter integer: invalid input Enter integer: invalid input Enter integer: invalid input Enter integer: invalid input BUILD SUCCESSFUL (total time: 3 seconds) I am able to check the user input for integer. So just a hint here. Within each iteration of your loop, m = scanner. The nextInt() method does not deal with the EOL token, while nextLine() does. put(1,"I"); map. Follow answered Sep 11, 2009 at 18:20. 3 2 2 silver badges 4 4 bronze badges. nextInt()` inside the loop. Checking for user input to be only integers in Java. Multiple Inputs From a User in C. Use while Loop With User Input Replace: sAwayTeam = scanInput. Albeit not as practical, it does have educational value. For example: Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company How can I read this input in Java using the scanner class? nextInt doesn't seem to take the next line character into account. max(b,Math. Oh, the calculator - a true classic! You can ask the Scanner class to give you the whole sentence, instead of just the next number by calling nextDouble(). nextLine(); } If you don't know the number of inputs (but you know what symbol will represent the end of the input), you can use a while loop The main "gotcha" that I have to warn you about when using Scanner is that you have to be careful handling the End Of Line (EOL) token. util package and provides methods to read In this extensive guide, we explored three different ways to read multiple inputs from the same line in Java: using Scanner, BufferedReader, and Console. util. Here's a snippet to illustrate: Scanner sc = new Scanner(System. Now whenever you are entering any value get the value from the map using get() method of Map. 137k 132 132 gold badges 304 304 silver badges 282 282 bronze badges. I'm Individually, they run fine individually but together it prints out incorrect numbers. Improve this question. I need help with user input checking if input You are right, but be careful if you have to read string using . Depending on what the user inputs. Modified 10 years ago. supriya supriya. int z = x * y; Then print out the result, or to simplify it, you could just print out the calculation without setting it equal to a variable Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Use Scanner. min(salespersons. nextLine() at the beginning of the loop, for the purpose of determining whether you should break the loop, then you do it again in order to get the actual number to sum. keyboard. g. This tutorial demonstrates how to create a while loop that keeps requesting the user input in Java. I think this may have to do with the output being within a for loop, but I am not too positive. You only need one count. Modified 6 years, 6 months ago. If you use array, you are setting a STATIC (does not change after initialized) length of the array to put data. nextInt(); It can also tokenize input with regular expression, etc. word) at a time. How can I take multiple input in single line using coma separation in Java? So the discount on the shoe is the minimum. packed_info = (age << 8) | (gender << 7) | height; Take age and move it's value over 8 bits then take gender and move it over 7 I am using a JOptionPane instead of Scanner and I'm also using an ArrayList. For some reason the output looks strange and it isn't working right. I working on a program where I have to read about 10^6 integers. hasNextInt():. What my program is doing now is multiplying just the last integer entered together, and will disregard If it the input is in a file i would recommend using a BufferedReader or Files. txt")) String line = br. nextInt(); double[] numbers = new double[n]; Then loop through the array, receiving a value for each index: for(int i = 0; i < numbers. in); // To input all 3 values in one line you can use. About; Products OverflowAI; Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; I'm using a for loop to create the first 400 multiples of 13, and I'm trying to to store these numbers into an array. nextInt(); for (int i = 0; i < t; i++) { int n = scanner. util package in a program before using the Scanner class. import java. in); int a = sc. ryoigw cnvy hjf olcko rqrr wul szdsxgn jrw tctigrp znhw