title: What does % mean in an OCaml external declaration?
body: <p>Many <code>external</code> declarations in the OCaml standard library have a % at the beginning of the function name, such as the definition of <code>int_of_float</code>:</p>
  
  <pre><code>external int_of_float : float -&gt; int = "%intoffloat"
  </code></pre>
  
  <p>What does the '%' mean?</p>