// CSE 142, Summer 2008 (Helene Martin)
// Prompts user for numbers to sum until -1 is entered.

// Uses an infinite loop with a break -- this is NOT GOOD STYLE,
// but we show it to you because it is very common.  
// Do not do this on your homework

import java.util.*;

public class Sentinel {
	public static final int SENTINEL = -1;
	
	public static void main(String[] args) {
		Scanner console = new Scanner(System.in);
		int sum = 0;
		int number;

		while(true) {
    		System.out.print("Enter a number (" + SENTINEL + " to quit): ");
    		number = console.nextInt();
			
			if(number == SENTINEL) {  // exit condition
				break;
			}
			
			sum = sum + number;
		}
		
		System.out.println("The total is " + sum);
	}
}