</span> : <code class="type">float -&gt; bool</code></pre><div class="info ">
<div class="info-desc">
<p><code class="code">is_nan&nbsp;x</code> is <code class="code"><span class="keyword">true</span></code> iff <code class="code">x</code> is not a number (see <a href="Float.html#VALnan"><code class="code"><span class="constructor">Float</span>.nan</code></a>).</p>
</div>
<ul class="info-attributes">
<li><b>Since</b> 4.08.0</li>
</ul>
</div>

<pre><span id="VALis_integer"><span class="keyword">val</span> is