Calculating sum of digits using Recursion

Input: 253

Output: 10 
(we need to add the individual digits in the number) 

Source code:

import java.util.*;

import java.io.*;

public class Main

{

public static void main(String[] args) 

{

    Scanner s=new Scanner(System.in);

    System.out.println("Enter number");

    Long n =s.nextLong();

System.out.println("Answer: "+sumOfDigits(n));

}

public static Long sumOfDigits(Long n)

{

    if(n==0)

        return 0L;

        

    return (n%10)+sumOfDigits(n/10);

}

}

Output:

Enter number

1155588

Answer: 33