The actual function code is put into <code> tags.

XML encoding the code can be avoided using <![CDATA ... ]]> sections. 

<code>
  // XML entity encoding (hard to read)
  if (i &lt; 1) p = &amp;1;
</code>

<code>
<![CDATA[
  // CDATA syntax is harder to remember 
  // but the code within is far more readable
  if (i < 1) p = &1;
]]>
</code>