Arrays in JavaScript

Now we will begin to study a special data type called array. An array is a variable in which you can store a whole set of some values in an ordered way.

The values that an array stores are called elements. Elements are separated by a comma. It is common practice to put spaces after this comma.

Square brackets are used to create an array:

let arr = [];

Let's fill our array with strings:

let arr = ['a', 'b', 'c'];

And now let's fill the array with numbers:

let arr = [1, 2, 3];

In addition to strings and numbers, you can store all valid data types in an array, as well as mix them together in one array, example:

let arr = [1, 2, 'a', 'b', null, true, false];

Create an array of numbers. Print it to the screen with alert and also log it to the console with console.log.

Create an array of strings. Print it to the screen with alert and also log it to the console with console.log.