Challenge 1: Compute the Square of a Number

Given a number, implement a function to compute its square.

Problem Statement

Implement a function that takes a number testVariable and returns the square of the number. Try using the following mathematical identity to solve this problem. (n1)2=n22n+1(n-1)^2 = n^2 - 2n + 1.

Remember to implement your solution recursively.

Input

A variable testVariable that contains the input number

Output

The square of the input number

Sample Input

5

Sample Output

25

Try it Yourself

Try this challenge yourself before examining the solution. Good luck!

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