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 two ways of doing this. You can place the JavaScript between <script> tags within the <head> of the document:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd"> <html> <head> <script type="text/javascript"> JavaScript goes here...

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