/*
CSE 142, Autumn 2007, Marty Stepp

This version of our sentinel program shows a loop with a break statement.
You should not use the break statement on your homework assignments.
*/
import java.util.*;   // for Scanner

public class Sentinel {
    // when we see this value, we'll stop reading numbers
    public static final int SENTINEL = -1;

    public static void main(String[] args) {
        Scanner console = new Scanner(System.in);
        int sum = 0;
        
        // an infinite loop that breaks immediately if the sentinel is read;
        // somewhat of a hack, but it works
        while (true) {
            System.out.print("Enter a number (" + SENTINEL + " to quit): ");
            int number = console.nextInt();
            
            if (number == SENTINEL) {
                break;   // stop this loop, I want out!
            }

            sum = sum + number;
        }

        System.out.println("The total is " + sum);
    }
}