18.UNDEF
Purpose:Command removes the the user-defined functions.
Status:Implemented
Syntax:
undef [function_name] undef all
Comments:
all flag removes all the user defined functions.
Example:
   gnucap>undef max    Removes the ''max'' function
   gnucap>unalias all   Removes all function definitions
   are you sure you want to remove all function definitions?y/n:y
   all functions removed.
   gnucap>