why do I get 24 when adding 2 + 4 in javascript
<p>I am trying this:</p>

<pre><code>function add_things() {
  var first = '2';
  var second = '4';
  alert(first + second);
}
</code></pre>

<p>But it gives me 24 instead of 6, what am I doing wrong?</p>
