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: Runtime Error)

import java.util.Scanner;
import javax.sound.midi.SysexMessage;
  
public class Main{      
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int i = 0;
        for(;i<1000;i++){
            int ans=0;
            int m = sc.nextInt();
            if(m==0)
                break;
            int len = String.valueOf(m).length();
            for (int j = 0; j<len; j++)
            {
                ans += Character.getNumericValue(String.valueOf(m).charAt(j));
            }
            System.out.println(ans);  
        }
       
    }
}