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);
    for(int i=0;;i++){
      int num = 0;
      String s = sc.next();
      if(s.equals("0")) break;
      for(int j=0;j<s.length();j++){
        num += Character.digit(s.charAt(j), 10);
     }
      System.out.println(num);
    }
  }
}