SET

  Defines parameters. SET [p = a ] [, p = a ] ;

p

New or old parameter name . Upto 16 characters consisting of upper/lower case alphabets, numericals, and underscore `&#;'137'. The first character must not be a numerical. Unchangeable predefined parameters (Pi, Time, etc) and the predefined function names (Sin, etc) have to be avoided. All the predefined parameter names and function names start with an uppercase letter. Therefore, a user parameter starting with a lower case alphabet will never hit the predefined ones.

a

An expression. See Sec.2.4.