 library project and open the <b>script.fsx</b> file.</li>
          <li>Copy the the list of inteter option types and sum the values.</li>
          <li>Run the code in the REPL.</li>
        </ol>
        <p><img class="indent-none" src="res/images/optiontypes.png" alt="---- comleted project -----"/> </p>
        
        <h1>Steps</h1>
        <h2>Option Types</h2>
        <ol>
            <li>Start a new F# library project and open the <b>script.fsx</b> file.</li>
            <li>Make sure your REPL win