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.*;

public class Main{
    public static void main(String[] args)
    {
        Scanner sc = new Scanner(System.in);
        while(true)
        {
            char[] chars = sc.next().toCharArray();
            if(chars.length == 1 && chars[0] == '0') break;
            int ans = 0;
            for (char c : chars) {
                ans+= c -'0';
            }
            System.out.println(ans);

        }
        sc.close();
    }
}