CALCVAR ResultVar  Argument operator Argument

  ******* THIS COMMAND IS OBSOLETE *********

  You can use instead the  $(expression)  method to do complex
  math calculations using flaoting point numbers etc.

  However, the command still works for compatibility, but it does
  not handle floating point numbers - it converts them to whole
  numbers - which may sometimes prove useful..

  ******************************************

  This command is a feeble attempt at giving Gui4Cli some mathematical
  abilities. Gui4Cli is not meant to be a programming language in
  the usual sense, so maths is usually not needed, still...

  CalcVar Result 2 + 3
  - will place the number 5 into variable Result.

  You can also (like in the SetVar command) use :
  Result == 2 + 3
  - which is easier to the eye.

  All calculations are *Integer* only! 

  Operators are : + - * / also % (modulus) and ^ (to the power of)