/sys$common/syshlp/helplib.hlb PASCAL, Predeclared Routines, Misc, CARD  *Conan The Librarian (sorry for the slow response - running on an old VAX)

  The CARD function returns an integer value indicating the number
  of components that are currently elements of the set expression.

  Syntax:

     CARD( s )

  The parameter 's' must be a set expression.