Challenge 1: Compute the Square of a Number

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. $(n-1)^2 = n^2 - 2n + 1$.

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!