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 scanner = new Scanner(System.in);

        for (;;) {
            char[] digits = scanner.next().toCharArray();
            
            if(digits.length == 1 && digits[0] == '0')
                return;

            int ans = 0;
            for(int i = 0; i < digits.length; ++i) {
                ans += Character.getNumericValue(digits[i]);;
            }

            System.out.println(ans);
        }
    }
}