class="p">(</span><span class="n">size</span><span class="p">(</span><span class="n">iarr</span><span class="p">)</span><span class="o">+</span><span class="mi">1</span><span class="p">)</span><span class="o">/</span><span class="mi">2</span><span class="w"></span>
<span class="w">   </span><span class="k">call </span><span class="n">unit_check</span><span class="p">(</span><span class="s1">&#39;valnth&#39;</span><span class="p">,</span><span class="n">valnth</span><span class="p">(</span><span class="n">ia