/*----------------------------------------------------------
 *				HTBLA-Leonding / Class: <your class>
 * ---------------------------------------------------------
 * Title:			Sum of Digits
 * Author:			*/ your name /*
 * ----------------------------------------------------------
 * Description:
 * Recursive and iterative implementation of an algorithm that calculates 
 * the sum of the digits of a given positive integer.
 * ----------------------------------------------------------
 */

/*
Instructions:

Define a function sum_of_digits(n) that takes a positive integer `n` as input.
The sum of digits can be calculated as n mod 10 + sum of digits of n / 10 as long as n is larger than ten.

*/

// TODO: the recursive implementation

// TODO: the iterative implementation