public class Solution {
    public static void main(String[] args) {
        System.out.println(sumDigitsInNumber(546));
    }

    public static int sumDigitsInNumber(int number) {
        //write your code here
        int sum = 0;
        while (number > 0){
            sum = sum + number % 10;
            number = number / 10;
        }
        return sum;
    }
}