The array index number starts from 0 and increases by 1 for each element added to the array. Inside the square brackets, specify the index of the element you want to access.įor example, here's how you access the first element of myArray: let myArray = To access an array's element, you need to specify the array name followed by square brackets. How to Access an Array's ElementsĪs I've said before, an array is an ordered collection, so you can access an element from its position (also known as index number) in the array. This is because it's faster to type instead of Array(). In most code examples and codebases, you'll most likely see developers use the square brackets to create an array instead of using the constructor. Note that the constructor function can be called with or without the new operator. You can specify as many elements as you want inside the square brackets.Īnother way to create an array is to use the Array() constructor, which works like the square brackets: let myArray = Array(29, 'Nathan', true) let myArray = Īnd here's how to create an array with 3 number elements: let myNumbers = The following example shows how to create an array named myArray that has three elements of different types: a Number, a String, and a Boolean. The array elements are defined inside the brackets, with each element separated using a comma. The square brackets is a literal notation used to create an array. There are two ways you can create an array in JavaScript: This means that you can add as many elements to an array as you want. You'll see why this is important in the next section.Īn array can hold elements of different data types, and the size of the array is not fixed. This means you can access an array's element using its position in the collection. In JavaScript, an array is implemented as an object that can have a group of items, elements, or values as an ordered collection. We'll cover the specific rules you need to follow when creating an array, as well as how to use array methods to manipulate and transform your array as desired. In this handbook, you'll learn how to work with arrays in JavaScript. ![]() Arrays are very useful because you can store, access, and manipulate multiple elements in a single array. In programming, an array is a data structure that contains a collection of elements.
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