hat is going to call it.</p>
<p>The output for the same sample program as before is:</p>
<div class="code-sample lang-out" title="check-name-lengths.out">
<div class="highlight"><pre><span></span><code>x at line 6
y at line 7
</code></pre></div>
</div>
<p class="continue">The exercises will ask why the parameter <code>x</code> doesn&rsquo;t show up
as a violation of our rule
that variables&rsquo; names must be at least four characters long.</p>
<h2 id="style-checker-walker">Section 14.5: How does the AST wa