Write a Recursive Function in JavaScript

A recursive function - a function that calls itself - is a key tool in every functional programmer's toolbox. The body of a recursive function needs two main parts:

• a recursive case, in which the recursive call is made, and
• a base case, which does not involve recursion and prevents the function from recursing infinitely.

In this lesson we'll learn the anatomy of a recursive function by writing a function to compute the factorial of a positive integer.