## Get Length

### Instructions

Create a `getLength` function that takes an array or a string
and return its length.


### Notions

- [https://nan-academy.github.io/js-training/examples/data-structures.js](https://nan-academy.github.io/js-training/examples/data-structures.js)
- [https://nan-academy.github.io/js-training/examples/get.js](https://nan-academy.github.io/js-training/examples/get.js)