title: Lua: What's the difference between null and nil?
body: <p>I'm developing a plugin for <a href="http://rustoxide.com/" rel="noreferrer">Oxide 2</a>. I've been learning from other plugins and I've noticed that some of them use <code>null</code> instead of <code>nil</code>. For example:</p>
  
  <pre><code>if args[1] == null then
  </code></pre>
  
  <p>Oxide 2 is written in C#, so I assume that <code>null</code> is defined in C# or in Lua Interface.</p>
  
  <p>Is there any difference between them?</p>
  
  <hr>
  
  <p><strong>Update:</strong>
  I've somewhere read that it can be used for check, if MySQL column is <code>NULL</code>. Is that true?</p>