info-desc">
<p><code class="code">iter2&nbsp;f&nbsp;[a1;&nbsp;...;&nbsp;an]&nbsp;[b1;&nbsp;...;&nbsp;bn]</code> calls in turn
   <code class="code">f&nbsp;a1&nbsp;b1;&nbsp;...;&nbsp;f&nbsp;an&nbsp;bn</code>.</p>
</div>
<ul class="info-attributes">
<li><b>Raises</b> <code>Invalid_argument</code> if the two lists are determined
   to have different lengths.</li>
</ul>
</div>

<pre id="VALmap2">val map2 : ('a -&gt; 'b -&gt; 'c) -&gt; 'a list -&gt; 'b list -&gt; 'c list</pre><div class="info ">
<div class="info