eturns either <code class="code">x</code> or <code class="code">-. x</code>, but it is not
  specified which.<br>
<b>Since</b> 4.00.0<br>
</div>

<pre><span id="VALmod_float"><span class="keyword">val</span> mod_float</span> : <code class="type">float -&gt; float -&gt; float</code></pre><div class="info ">
<code class="code">mod_float a b</code> returns the remainder of <code class="code">a</code> with respect to
   <code class="code">b</code>.  The returned value is <code class="code">a -. n *. b</code>, w