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){
            int sum = 0;
            String st = sc.next();
            if(st.equals("0")) break;
            for(int i=0; i<st.length(); i++){
                //System.out.println();
                sum = sum + (st.charAt(i) - '0');
            }
            System.out.println(sum);
        }
        sc.close();
    }
    
}