# Challenge 3: Sort an Array

Given an array of numbers, sort it in ascending order.

## We'll cover the following

## Problem Statement

Implement a function that sorts the input array `testVariable`

**in-place**.

**In-place** means that no **extra** array or any other data structure is used in the algorithm. Such algorithms produce an output in the **same memory/space** that contains the data by transforming the input `in-place`

. However, a **constant** extra space can be used in the form of simple variables.

Remember to solve this problem recursively.

### Input

- An array
`testVariable`

containing numbers. - The length of the array

### Output

No output. Our task is to sort the input array.

### Sample Input

```
testVariable = [5, 4, 2, 3, 1]
length = 5
```

### Sample Output

```
# No explicit output.
# However the state of array testVariable is [1, 2, 3, 4, 5]
```

### Try it Yourself

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

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