Chapter 2. JavaScript Syntax

What this chapter covers:

  • Statements

  • Variables and arrays

  • Operators

  • Conditional statements and looping statements

  • Functions and objects

This chapter is a brief refresher in JavaScript syntax, taking on the most important concepts.

What you'll need

You don't need any special software to write JavaScript. All you need is a plain text editor and a web browser.

Code written in JavaScript must be executed from a document written in (X)HTML. There are three ways of doing this. You can place the JavaScript between <script> tags within the <head> of the document:

<!DOCTYPE html >
<html lang="en">
<head>
  <meta charset="utf-8"/>
  <title>Example</title>
  <script>
    JavaScript goes here...
  </script>
</head>
<body>
  Mark-up goes here... </body> ...

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