# Challenge 1: Compute Square of a Number

Given a number, implement a function to compute the square of that number.

## We'll cover the following

## 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!

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