title: What does this line of javascript do?
body: <p>While looking at the <a href="http://javascript.crockford.com/code.html" rel="noreferrer">jslint code conventions</a> I saw this line:</p>
  
  <pre><code>total = subtotal + (+myInput.value);
  </code></pre>
  
  <p>What is the purpose of the second '+'?</p>