an>
<span class="p">!</span><span class="w"> </span><span class="nx">call</span><span class="w"> </span><span class="nx">rank</span><span class="p">(</span><span class="nx">x</span><span class="p">,</span><span class="nx">y</span><span class="p">)</span>
<span class="nx">end</span><span class="w"> </span><span class="nx">program</span><span class="w"> </span><span class="nx">demo_rank</span>
</code></pre></div>

<p>Results:</p>
<h2 id="author">AUTHOR</h2>
<div class="codehilite"><pre><span></span><code><spa