Its not that important, but its easier than you might think. A lot of forumboards / cms editors of websites have so many icons to manipulate the text you type... I just ignored them for a long time. When typing or editing a POST, at the second row of tools the last 3 icons on the right are useful "# <> and php" its the one with #.

You can also type your code between <code>put text here...</code> but use swap the <> with [ ] and it works