Basic syntax

Introduction
There are several ways of writing php code: Code statements are then embeded within the tags  Example:  echo is a php output statement. When it occurs, whatever comes after it is output to the document. Therefore, the above code will print Hello world to the web page.
 * 1) The code is enclosed within 
 * 2) Writing in script tags statements;
 * 3) Embeding in <? and ?> tags.

You can also combine html and php in a single file. Example:  This is HTML  The php Syntax is more or less similar to c++ or Java. The php statements are terminated by a semicolon, in php, white spaces don't make any special differance.

Example:  You can also combine php, JavaScript, and HTML on one page.

Floating point numbers

 * 1) php Strings