Calculating Sum of Digits of a given Number

 

import java.util.*;

public class SumOfDigit {

public static int calculateSum(int n) {

int sum = 0;

if (n >= 0 && n <= 9) {

return n;

}

while (n > 0) {

int digit = n % 10;

sum = sum + digit;

n = n / 10;

}

return sum;

}

public static void main(String args[]) {

int arr[] = { 1234, 2341, 5462, 567342, 1238 };

for (int i = 0; i < arr.length; i++) {

int x = calculateSum(arr[i]);

System.out.println("Sum of the digit of " + arr[i] + " is = " + x);

}

}

}