VMS Help FORTRAN, Data, Constants, Complex  *Conan The Librarian (sorry for the slow response - running on an old VAX)

  A complex constant consists of a pair of real or integer constants.
  The two constants are separated by a comma and enclosed in
  parentheses.  The first constant represents the real part of the
  number and the second constant represents the imaginary part.

  Compaq Fortran supports COMPLEX*8 and COMPLEX*16 complex constants.

  A COMPLEX*8 has the form:

   (c,c)             c is an integer or REAL*4 constant

  A COMPLEX*16 has the form:

   (c,c)             c is an integer, REAL*4, or REAL*8 constant
                     (at least one of the pair must be a
                                                REAL*8 constant)