e
            first element of <code class="computeroutput"><span class="identifier">seq</span></code>
            of type <code class="computeroutput"><span class="identifier">T</span></code>, or <code class="computeroutput"><a class="link" href="../../../sequence/intrinsic/functions/end.html" title="end"><code class="computeroutput"><span class="identifier">end</span></code></a><span class="special">(</span><span class="identifier">seq</span><span class="special">)</span></code> if there is no such elemen