When we're dealing with large amounts of data, we want to make sure we can organize and manage it properly.

In {lang}, we use arrays to store several pieces of data in one place.

Array Declaration / Creation:

You start an array declaration with an opening square bracket, end it with a closing square bracket, and put a comma between each entry, like this:

let sandwich = ["peanut butter", "jelly", "bread"]

In this program we created an array consisting of 3 string items: "peanut butter", "jelly" and "bread".

Then, we stored that array in a variable sandwich so we can later access it. For example, I can print the array:

// Creating the array:
let sandwich = ["peanut butter", "jelly", "bread"];

// Printing the array:
console.log(sandwich); // Output: ["peanut butter", "jelly", "bread"]

Items Data Types

Arrays can store any data types (strings, integers, booleans, etc.) and the items shouldn't necessary be of the same data type. For example:

let myArray = ["Hello world!", 32, False];

myArray consits of one string item, one number item and one boolean item.

We use arrays to better organize pieces of data which are part of the same family or share the same meaning, like the name of our friends or the items in a sandwich.

So most of the time we will have arrays where the items share the same data type.

Assignment
Follow the Coding Tutorial and let's play with some arrays.

Hint
Look at the examples above if you get stuck.