# 02 - Making Lists: Arrays
An **Array** is an ordered list of items. You create an array using square brackets `[]`, with each item in the list separated by a comma.
Arrays are perfect for collections of things, like a list of tags, a group of users, or a sequence of steps.
### Simple Lists
You can create a simple list of primitive values like strings or numbers.
```mon
{
// A list of strings
tags: ["tutorial", "mon", "beginner"],
// A list of numbers
winning_numbers: [12, 45, 77, 81],
}
```
### Lists of Objects
More powerfully, you can create a list where each item is an object. This is a fundamental pattern for structuring complex data.
```mon
{
// A list of users, where each user is an object
users: [
{
name: "Alice",
role: "admin",
},
{
name: "Bob",
role: "viewer",
},
],
}
```
### Challenge 2: Your Favorite Things
Create a file named `favorites.mon`. Inside the root object, add a key named `favorite_movies`. The value should be an array where each item is an object representing a movie. Each movie object should have a `title` (String) and a `release_year` (Number).
---
### Answer to Challenge 2
```mon
{
favorite_movies: [
{
title: "The Matrix",
release_year: 1999,
},
{
title: "Inception",
release_year: 2010,
},
],
}
```
Excellent! You can now structure both single items and lists of items. Next, we'll learn how to stop repeating ourselves by reusing data within a file.
---
**Next up**: [03 - Reusing Data: Anchors and Spreads](03_reusing_data.md)