Java: Compute the sum of the digits in an integer

Java Method: Exercise-6 with Solution

Write a Java method to compute the sum of digits in an integer.

Test Data:
Input an integer: 25

Pictorial Presentation:

Sample Solution:

Java Code:

import java.util.Scanner;
public class Exercise6 {

  public static void main(String[] args)
    {
      Scanner in = new Scanner(System.in);
      System.out.print("Input an integer: ");
      int digits = in.nextInt();
	  System.out.println("The sum is " + sumDigits(digits));
    }

 public static int sumDigits(long n) {
		int result = 0;
		
		while(n > 0) {
			result += n % 10;
			n /= 10;
		}
		
		return result;
	}
	
 }

Sample Output:

Input an integer: 25                                                                                          
The sum is 7

Flowchart:

Java Code Editor:

Contribute your code and comments through Disqus.

Previous: Write a Java method to count all words in a string.
Next: Write a Java method to display the first 50 pentagonal numbers.