class="hljs-number">1</span>, <span class="hljs-number">10</span> <span class="hljs-keyword">do</span>
  <span class="hljs-built_in">print</span>(number)
<span class="hljs-keyword">end</span>

<span class="hljs-keyword">return</span> number
</code></pre>
<pre><code>=&gt; nil
</code></pre><p>This is called a <em>local variable</em>, because it only exists locally within the for loop.</p>
<p>For loops actually have 3 parameters:</p>
<ul>
<li>start number - we assign the variable to it and the variable will in