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 stdIn = new Scanner(System.in);
        while(true) {
            String x = stdIn.next();
            if(x.equals("0"))
                break;
            int sum = 0;
            for(int i = 0; i < x.length(); i++) {
                // sum += Character.digit(x.charAt(i), 10);
                sum += x.charAt(i) - '0';
            }
            System.out.println(sum);
        }
    }
}