Understanding Data Types in JavaScript

Introduction

Data types are used to classify one particular type of data in programming languages. For instance, a number and a string of characters are different types of data that will be treated differently by JavaScript.

This is important because the specific data type you use will determine what values you can assign to it and what you can do to it. This is to say, to be able to do operations with variables in JavaScript, it is important to understand the data type of any given variable.

In this tutorial, we will go over how data types work in JavaScript as well as the important data types native to the language. This is not an exhaustive investigation of data types, but will help you become familiar with the options available to you in JavaScript.