Challenge 1: Compute Square of a Number

Problem Statement

Implement a function that takes a specific number testVariable and returns the square of the number.

Use 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!