  </span><span class="n">iflag</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">0</span>
<span class="w">         </span><span class="n">zmin</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">Z</span><span class="p">(</span><span class="mi">1</span><span class="p">)</span>
<span class="w">         </span><span class="n">zmax</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">Z