Problem:
Sum of Numbers

Write a program which reads an integer and prints sum of its digits.

Input

The input consists of multiple datasets. For each dataset, an integer x is given in a line. The number of digits in x does not exceed 1000.

The input ends with a line including single zero. Your program should not process for this terminal symbol.

Output

For each dataset, print the sum of digits in x.

Sample Input

123
55
1000
0

Sample Output

6
10
1

Solution in JAVA (judge verdict: Accepted)

import java.util.Scanner;

public class Main{
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		while(true){
			String a = sc.next();
			if(a.equals("0"))break;
			int b,sum=0;
			for(int i=0;i<a.length();i++){
				b = a.charAt(i) - '0';
				sum += b;
			}
			System.out.println(sum);
		}
	}
}