Complex

 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.

 VSI Fortran provides three kind type parameters for data of type
 complex:  COMPLEX(KIND=4) (or COMPLEX*8), COMPLEX(KIND=8) (or
 COMPLEX*16), and COMPLEX(KIND=16).  COMPLEX(KIND=8) is DOUBLE
 COMPLEX.  The type specifier for the complex type is COMPLEX; the
 type specifier for the double complex type is DOUBLE COMPLEX.

 If a kind type parameter is specified, the complex constant has the
 kind specified.  If no kind type parameter is specified, the kind
 type of both parts is default real, and the constant is of type
 default complex.

 A COMPLEX (COMPLEX(KIND=4) or COMPLEX*8) constant has 
 the form:

  (c,c)         

   c   Is an integer or REAL (REAL(KIND=4) or REAL*4) 
       constant

 A DOUBLE COMPLEX (COMPLEX(KIND=8) or COMPLEX*16) constant 
 has the form:

  (c,c)             

   c   Is an integer, REAL (REAL(KIND=4) or REAL*4), or 
       DOUBLE PRECISION (REAL(KIND=8) or REAL*8) constant.
       At least one of the pair must be a DOUBLE PRECISION 
       constant.

 A COMPLEX(KIND=16) or COMPLEX*32 constant has the form:

  (c,c)             

   c   Is an integer, REAL (REAL(KIND=4) or REAL*4),  
       DOUBLE PRECISION (REAL(KIND=8) or REAL*8), or 
       REAL (KIND=16) (or REAL*16) constant.  At least 
       one of the pair must be a a REAL(KIND=16)constant.

 Note that the comma and parentheses are required.