"><a href="#val-both" class="anchor"></a><code><span class="keyword">val</span> both : <span><span class="type-var">'a</span> <a href="index.html#type-t">t</a></span> <span>&#45;&gt;</span> <span><span class="type-var">'b</span> <a href="index.html#type-t">t</a></span> <span>&#45;&gt;</span> <span><span>(<span class="type-var">'a</span> * <span class="type-var">'b</span>)</span> <a href="index.html#type-t">t</a></span></code></dt><dd><p><code>both (F a) (F b)</code> is <code>F (a, b)</code>, i.e., it is the