WordPress Posting Source Code with Line Number

While WordPress.com doesn’t allow you to use potentially dangerous code on your blog, there is a way to post source code for viewing. We have created a shortcode you can wrap around source code that preserves its formatting and even provides syntax highlighting for certain languages, like so:

html{height:100%;}
body{font-size:11px; margin:0; padding:0; height:100%; }
#container{width:100%; margin:0px auto; height:100%; clear:both}

To accomplish the above, just wrap your code in these tags:

[sourcecode language=”css”]
your code here
[/sourcecode]

The language parameter controls how the code is syntax highlighted. The following languages are supported:

• actionscript3
• bash
• clojure
• coldfusion
• cpp
• csharp
• css
• delphi
• erlang
• fsharp
• diff
• groovy
• html
• javascript
• java
• javafx
• matlab (keywords only)
• objc
• perl
• php
• text
• powershell
• python
• r
• ruby
• scala
• sql
• vb
• xml

Source: http://en.support.wordpress.com