title: Do I need a "/" at the end of an <img> or <br> tag, etc.?
body: <p>Do you need to have a <code>/</code> at the end of an <code>img</code> tag? I saw <a href="http://www.w3schools.com/tags/tag_img.asp" rel="noreferrer">an example</a> on W3schools.com without a <code>/</code>:</p>
  
  <pre><code>&lt;img src="smiley.gif" alt="Smiley face" height="42" width="42"&gt;
  </code></pre>
  
  <p>I know it isn't necessary to self-close the tag, at least in my browser, but should I do so?</p>