        </p>
                  </td>
<td>
                    <p>
                      The default behavior is to not to require generating a sign.
                      If the function <code class="computeroutput"><span class="identifier">force_sign</span><span class="special">()</span></code> returns true, then all generated
                      numbers will have a sign (<code class="computeroutput"><span class="char">'+'</span></code>
                      or <code class="computeroutput"><span class="c