Code element button is used for displaying code in programming language tutorials. Most bloggers use if for showing hacks and small code snippets inside their post content. By default code element button is present only on WordPress HTML editor, alternatively you many also use its tags and enclose your code using <code> and </code>. This tutorial explains you how to very easily add code element button both on WordPress visual and full screen editor.
First install and activate the new WordPress plugin called TinyMCE Code Element. After activation visit your admin area Dashboard -> Posts -> Add New and you will be seeing new <> sign button added to your visual editor.
Now simply select the code you have written inside your post and click the code element TinyMCE button as shown in the given screenshot.