$lst_tit bound$lst_titend$type_exec
$(lst_syntax)bound $emph vname$emphend between [integer]
$emph v1$emphend and $emph v2$emphend [default $emph defaultvalue$emphend]
</tt> <br/>or<br/><tt>
$
!bound
$emph vname
$emphend within
$emph list$emphend [default $emph defaultvalue$emphend]</tt>
$lst_mean bound the
range of the variable
$emph vname
$emphend. Usually
this is used on user-submitted variables. <br/>
The first syntax is usually for numerical variables (integer or real,
defaults to real). In this case $emph v1$emphend and $emph v2$emphend
supplies the lower and upper bounds for the value of $emph
vname$emphend. <br/>
In the second syntax, the value of $emph vname $emphend is compared with
each item of
$emph list$emphend. If no occurrence is found
, the value of
$emph vname$emphend is replaced either by $emph defaultvalue$emphend or
the first item of
$emph list$emphend, according to whether
$emph defaultvalue
$emphend is
defined. <br
/> In any case, $emph defaultvalue$emphend is optional.