dentifier">all</span></code></a><span class="special">(</span><span class="identifier">seq</span><span class="special">,</span> <span class="identifier">f</span><span class="special">);</span>
</pre>
<p>
            <span class="bold"><strong>Return type</strong></span>: <code class="computeroutput"><span class="keyword">bool</span></code>
          </p>
<p>
            <span class="bold"><strong>Semantics</strong></span>: Returns true if and only
            if <code class="computeroutput"><span class="ide