title: OCaml Option get
body: <p>I'm new to OCaml, I'm trying to understand how you're supposed to get the value from an 'a option.  According to the doc at <a href="http://ocaml-lib.sourceforge.net/doc/Option.html">http://ocaml-lib.sourceforge.net/doc/Option.html</a>, there is a get function of type 'a option -> 'a that does what I want.  but when I type: </p>
  
  <pre><code># let z = Some 3;;
  val z : int option = Some 3
  # get z;;
  Error: Unbound value get
  # Option.get z;;
  Error: Unbound module Option
  </code></pre>
  
  <p>Why isnt this working?</p>