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Learn JavaScript: Course OverviewCourse Overview

Arrays

In this course, you will learn about arrays, a data structure in JavaScript used to store lists of data.

Key Concepts

Review core concepts you need to learn to master this subject

Property .length

Index

Method .push()

Method .pop()

Mutable

Arrays

Property `.length`

const numbers = [1, 2, 3, 4];

numbers.length // 4

The .length property of a JavaScript array indicates the number of elements the array contains.

Arrays

Lesson 1 of 1

What you'll create

Portfolio projects that showcase your new skills

Secret Message
It's time to build fluency in JavaScript Arrays. In this next Pro Project, we're going to practice array methods in JavaScript so you can hone your skills and feel confident taking them to the real world. Why? You'll be able to put into practice some of the JavaScript array methods you've learned in this lesson. Your goal is to be able to successfully retrieve and manipulate the data in your array. What's next? Chris Pine, some programming wisdom, more JavaScript. You got this!

How you'll master it

Stress-test your knowledge with quizzes that help commit syntax to memory

Arrays Quiz
What is the purpose of an array?

Arrays