Summary
In this chapter, we introduced essential aspects of the JavaScript programming language. We started with some basic background that explained why JavaScript is the most popular language in the world today, as well as the various uses of JavaScript. Next, we looked at the fundamental concepts of the language, where we talked about declaring variables and also the eight data types available in JavaScript. Following that, we talked about branching and looping constructs in JavaScript and showed some examples of using them, and finally, we briefly discussed functions and classes in JavaScript.