edaBit-coding-challenges/Recursion--Sum/code.cpp

/*  Write a function that finds the sum of the first n 
 *  natural numbers. Make your function recursive. 
 *  sum(5) ➞ 15
 *  1 + 2 + 3 + 4 + 5 = 15
 */
int sum(int n) {
	return (n>0) ? n+sum(n-1):0 ;
}