Introduction to JavaScript

JavaScript is a very popular scripting language and is commonly used in websites to provide enhanced user interfaces. This section of the chapter is an introduction to the fundamental concepts of the JavaScript language. The concepts introduced will provide the programming building blocks demonstrated in the code examples throughout this book. In addition to the content described in this chapter, there are many other resources available on the Internet to continue learning JavaScript or to obtain additional code examples.

Variables

Variables are temporary containers used to store information to be recalled at a later point. Once created, the value in the variable can be accessed, or read, across the document and can be manipulated or changed as desired. The following sections of this chapter ...