How to exit the loop with the number 0? but now i have other problems

Question

package hw3;

public class Main {
    public static void main(String[] args) {
        final int NumberOfElements = 1000;
        int[] num = new int[NumberOfElements];
        int var = 0;
        //create input
        java.util.Scanner input = new java.util.Scanner(System.in);
        for (int i = 0; i < NumberOfElements; i++) {
            System.out.print("Enter any positive number or enter 0 to stop: ");
            num[i] = input.nextInt();
            var++; 
            if (num[i] == 0)

                break;

            }
             Arrays.sort( num, 0, var);
             int i;
             for (i = 0; i < var; i++) {
             System.out.print("   " + num[i]);


        }
    }
}

Write a Java program reading a sequence of positive integers entered one per line. The program stops reading when integer ‘0’ is entered. The program will sort and output them into an ascending numerical order.For example: 5 1 7 12 36 8 0 Output: 1 5 7 8 12 36

Answer 1

Here your application is reading int, you can check that the last one is != from 0. And break the loop.
If you don't like using break, you can still add a condition to your for.

For sorting an array, there is the Arrays.sort() solution.

And to print them you'll need another loop, but beware as you can have less than 1000 items in your array you can't simply print the whole array.
You'll need to find a way to count the number of elements you added in the array.

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After your edit:

Good your application seems to work here is what I got :

Mac-Makkhdyn:~ Makkhdyn$ java hw3.Main
Enter any positive number or enter 0 to stop: 1
Enter any positive number or enter 0 to stop: 2
Enter any positive number or enter 0 to stop: 3
Enter any positive number or enter 0 to stop: 4
Enter any positive number or enter 0 to stop: 5
Enter any positive number or enter 0 to stop: 0
Mac-Makkhdyn:~ Makkhdyn$

The 0 you have must be from somewhere else. Isn't your actual code slightly different from the one you posted here ?

---

Resources :

• javadoc - Arrays.sort()
• Java tutorial - The break Statement

Answer 2

num[i] holds the last number you are reading. So you have to compare it against 0 and if it is 0, you have to end the loop. Read about branching statements to find out how to do that.

It is probably also good for you to read about control flow statements in general.