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javaloopsinputwhile-loop

How would I use a while loop to keep requesting user input


I've tried a couple of things with the while loop and can't seem to get it to work. I want to keep requesting user input until the user inputs the number 0, here is the code I have so far:

import java.util.*;

public class Task10 {

    public static void main(String[] args) {
        System.out.println("Enter a year to check if it is a leap year");
        Scanner input = new Scanner(System.in);
        int year = input.nextInt();

        if ((year % 4 == 0) || ((year % 400 == 0) && (year % 100 != 0)))
            System.out.println(year + " is a leap year");
        else
            System.out.println(year + " is not a leap year");
    }
}

Solution

  • Use a while loop above input line as:

     while(true)
    

    And, use if condition to break.

    if(year == 0)
        break;
    

    Also, condition for leap year is wrong in your code. It should be:

    if((year % 100 == 0 && year % 400 == 0) || (year % 4 == 0 && year % 100 != 0))
        //its a leap year
    else
        //its not
    

    PS: As in comments, I'll give a complete code:

    import java.util.*;
    
    public class Task10 {
    
    public static void main(String[] args) {
        System.out.println("Enter a year to check if it is a leap year");
        while(true){
        Scanner input = new Scanner(System.in);
            int year = input.nextInt();
            if(year == 0)
                break;
            if((year % 100 == 0 && year % 400 == 0) || (year % 4 == 0 && year % 100 != 0))
                System.out.println(year + " is a leap year");
            else
                System.out.println(year + " is not a leap year");
        }
    }
    
    }