lass="identifier">top</span>
  <span class="special">&lt;&lt;</span> <span class="string">"[ P(X &lt;= "</span> <span class="special">&lt;&lt;</span> <span class="identifier">top</span>  <span class="special">&lt;&lt;</span> <span class="string">") - P(X&lt;= "</span> <span class="special">&lt;&lt;</span> <span class="identifier">bottom</span> <span class="special">&lt;&lt;</span> <span class="string">" ) ] is "</span>
  <span class="special">&lt;&lt;</span> <span class="identifier">cdf</span><span class="s