Java Program to Calculate Sum of Digits of a Given Number

Write a Java program to calculate sum of digits of a given number.

Source Code

import java.util.Scanner;

class SumOfDigits {

	public static void main(String[] args) {

		int num, sum=0;
		Scanner input = new Scanner(System.in);
		
		System.out.print("Enter the number :: ");
		num = input.nextInt();
		
		while(num > 0) {
			
			sum = sum + (num % 10);
			num = num / 10;
		}
		
		System.out.println("Sum of digits is :: " + sum);
	}

}

Output

C:\>javac SumOfDigits.java
C:\>java SumOfDigits
Enter the number :: 123
Sum of digits is :: 6


C:\>javac SumOfDigits.java
C:\>java SumOfDigits
Enter the number :: 456
Sum of digits is :: 15