
  when you need them.</p>

<h3>Set up utop</h3>

<p>You should create an <code>~/.ocamlinit</code> file in your home
  directory with the following contents:</p>

<pre ><code class="language-ocaml">
#require "core.top";;
#require "ppx_jane";;
open Base;;
</code></pre>

<p> This will open the Base standard library and set up some useful
  pretty-printers and syntax extensions. Notice that <code>#</code> is
  used to mark a toplevel directive, not a comment.</p>

<h2 id="editor-setup">Set up your editor</h2>