How to write a recursive method to return the sum of digits in an int?

Question

So this is my code so far.

    public int getsum (int n){
        int num = 23456;
        int total = 0;
        while (num != 0) {
            total += num         


        

Answer 1

public static int digitSum (int n)
  { 
    int r = n%10;       //remainder, last digit of the number
    int num = n/10;     //the rest of the number without the last digit
    if(num == 0)
    {
      return n;
    } else {
      return digitSum (num) + r;
    }}