title: Int Option instead of Int in F#
body: <p>I am having trouble with the following:</p>
  
  <pre><code>let safeDiv x y = 
    match (x,y) with
    | (_, Some 0) -&gt; None
    | (Some xx, Some yy) -&gt; Some (xx/yy)
    | _ -&gt; None
  </code></pre>
  
  <p>When I go to run this simple function in the interactive window of Visual Studio like so:</p>
  
  <pre><code>safeDiv 4 2
  </code></pre>
  
  <p>I get the following error...</p>
  
  <blockquote>
    <p>This expression was expected to have type int option but here has type int.    </p>
  </blockquote>
  
  <p>Could it be I'm meant to use <code>safeDiv</code> <code>Some(4)</code> <code>Some(2)</code>? This doesn't work either...</p>