ss="code">f</code>.</p>
</div>
<ul class="info-attributes">
<li><b>Since</b> 4.11.0</li>
</ul>
</div>

<pre id="VALfold_left">val fold_left : ('a -&gt; 'b -&gt; 'a) -&gt; 'a -&gt; 'b list -&gt; 'a</pre><div class="info ">
<div class="info-desc">
<p><code class="code">fold_left&nbsp;f&nbsp;init&nbsp;[b1;&nbsp;...;&nbsp;bn]</code> is
   <code class="code">f&nbsp;(...&nbsp;(f&nbsp;(f&nbsp;init&nbsp;b1)&nbsp;b2)&nbsp;...)&nbsp;bn</code>.</p>
</div>
</div>

<pre id="VALfold_right">val fold_right : ('a -&gt; 'b -