an class="n">valnth</span><span class="p">(</span><span class="n">iarr</span><span class="p">,</span><span class="mi">8</span><span class="p">).</span><span class="n">eq</span><span class="p">.</span><span class="mi">80</span><span class="p">,</span><span class="s1">&#39;Nth value&#39;</span><span class="p">)</span><span class="w"></span>
<span class="w">   </span><span class="c">! so a value at the middle would be</span>
<span class="w">   </span><span class="n">imiddle</span><span class="o">=</span><span 