Recursion in Javascript

A simple definition of Recursion is calling a function on itself. 

Recursion follows the divide-and-conquer method, where the problem is divided into
​sub-problems, solving the sub-problems and combining them with the final result.

Structure of a recursive function includes one or more base cases and recursive cases.
Base Case:  Inputs for which the function produces the result without recurring.
Recursive Case: Inputs for which the program calls itself.

​Add numbers ranging from 1 to 100 without using loops.