IN this problem we have to print the sum of all the numbers until the user enters zero.

my attempt:

import java.util.Scanner;

public class printsum_until_enter0 {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int sum = 0;
        //int count = 0;
        int x = in.nextInt();
        while (x >0) {
            if (x > 0) {

                sum = sum   x;
                System.out.println(sum);
                x--;

            } else {
                System.out.println("no data was entered");

            }

            x--;
        }

    }
}

it runs infinitly before writing X--...but now it takes only one input and after that it is executed...but it supposed to execute after entering 0 and sum of all the numbers before entering 0. But it is not happeing.Any solution guys...Code in java..

CodePudding user response：

Fixed your code

   package test1;
    import java.util.Scanner;
    public class printsum_until_enter0 {
        public static void main(String[] args) {
            Scanner in = new Scanner(System.in);
            int sum = 0;
            int x = in.nextInt();
            while (x >0) {
                if (x > 0) {
                    sum = sum   x;
                } else {
                    System.out.println("no data was entered");
                }
                x = in.nextInt();
            }
            System.out.println(sum);
        }
    }

CodePudding user response：

do {
  x = in.nextInt();
  if(x > 0) {
    sum =  x;
  }
} while(x > 0)

CodePudding user response：

Your problem is that you only ask the user for input once. What you want to do is move the scanner.nextInt part somehow into your loop. In java there is a concept called do while loop which executes the loop body first and then checks the loop condition if it should be repeated. If you do not want to use a do while loop you can use a while true loop to check if the input was 0 and exit. Notice also how x needs to be initialised before the function body to be recognized by the while statement

Unfortunately, I did not get why you decreased x in your code. Let me know if I misunderstood your question or you have any more questions

import java.util.Scanner;

import java.util.Scanner;

public class Main {

    public static void main(String[] args) {

        Scanner in = new Scanner(System.in);
        int sum = 0;
        int x = 0;

        do {
            System.out.println("Please insert a number: ");
            x = in.nextInt();

            // If x is 0 it wont change the sum
            sum  = x;
            System.out.println(sum);

        } while (x > 0);

        System.out.println("no data was entered");

    }

}