Recursion1_Factorial.js

/*
Do you know recursion?
This is a kata series that you can only solve using recursion.
#1 - Factorial

In mathematics, the factorial of a non-negative integer n, denoted by n!, is the product of all positive integers less than or equal to n. For example,

5! = 5 * 4 * 3 * 2 * 1 = 120.

The value of 0! is 1.

Your task

You have to create the function factorial that receives n and returns n!. You have to use recursion.

THis means NO LOOPS!!!!

*/

const factorial = n => {
  if (n===0) {
  return 1;
  }

  return n*factorial(n-1);
};