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  1. !! +exec+ +vardef+
  2. tit:bound
  3. type:$type_exec
  4. syntax:!bound ``vname'' between [integer] ``v1'' and ``v2'' [default ``defaultvalue'']\
  5.   !bound ``vname'' within ``list'' [default ``defaultvalue'']
  6. mean:bound the range of the variable ``vname''. Usually this is used on user-submitted variables.\
  7. <br>The first syntax is usually for numerical variables (integer or real,\
  8.   defaults to real). In this case ``v1'' and ``v2'' supplies the lower and \
  9.   upper bounds for the value of ``vname''. <br>\
  10.   In the second syntax, the value of ``vname '' is compared with\
  11.   each item of ``list''. If no occurrence is found, the value of\
  12.   ``vname'' is replaced either by ``defaultvalue'' or the first item of ``list'',\
  13.   according to whether ``defaultvalue'' is defined. <br>\
  14.   In any case, ``defaultvalue'' is optional.
  15.