ord">val</span> is_empty</span> : <code class="type">'a <a href="Stack.html#TYPEt">t</a> -&gt; bool</code></pre><div class="info ">
Return <code class="code"><span class="keyword">true</span></code> if the given stack is empty, <code class="code"><span class="keyword">false</span></code> otherwise.<br>
</div>

<pre><span id="VALlength"><span class="keyword">val</span> length</span> : <code class="type">'a <a href="Stack.html#TYPEt">t</a> -&gt; int</code></pre><div class="info ">
Return the number of element