JavaScript variables hold a wide variety of information and can be used with virtually any data type. Here's how to use variables to store numbers, text strings, objects, and more.

Scope in JavaScript refers to context (or portion) of the code which determines the accessibility (visibility) of variables. In JavaScript, we have two types of scope, local , and global.

In freeCodeCamp’s front-end development libraries course, students learn about several popular front-end development languages, including Bootstrap, Sass, React, jQuery and Redux.