erlink" href="#variable-names" title="Permalink to this headline">¶</a></h2>
<p>The guidelines for variable naming are very similar to those used for
class methods. Variables should contain only lowercase letters,
use underscore separators, and be reasonably named to indicate their
purpose and contents. Very short, non-word variables should only be used
as iterators in for() loops.</p>
<p><strong>INCORRECT</strong>:</p>
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$j<