Syntax Of JavaScript

Explanation of code

• The tag Script tell the browser to expect a script in between them. You specify the language using the type attribute. The most popular scripting language on the web is JavaScript.
• The bits that look like HTML comments tags are just that - HTML comment tags. These are optional but recommended. They tell browsers that don't support JavaScript (or with JavaScript disabled) to ignore the code in between. This prevents the code from being written out to your website users.
• The part that writes the actual text is only 1 line (document.write("JavaScript is not Java");). This is how you write text to a web page in JavaScript. This is an example of using a JavaScript function (also known as method).

Where to put your scripts?
You can place your scripts in any of the following locations: Between the HTML document's head tags. Within the HTML document's body (i.e. between the body tags). In an external file (and link to it from your HTML document).

The location choice of head or body is very simple. If you want to have a script run on some event, such as when a user clicks somewhere, then you will place that script in the head. If you want the script to run when the page loads, like our "Hello World!" example in the previous lesson, then you will want to place the script within the body tag.