le in the default
string, as in this example:
<p>
<TABLE SUMMARY="Example" BORDER="0" BGCOLOR="#efefef" WIDTH="100%">
<TR>
<TD>
<PRE>
<font color="#82140F">
.start. = 8                             # default
.stop. = 2                              # default
query .start. "Start time? " (.start.)
query .stop.  "Stop time?  " (.stop.)
</font></PRE>
</TD>
</TR>
</TABLE>
<p>
Variables can be manipulated using reverse polish notation (RPN)
mathematical operations (see <a href="ReversePolishMath.html#rpnMathematic