DOUBLE

 The  DOUBLE  type  denotes  double-precision  real  values.   To
 indicate a double-precision real number, you must include a real
 number or an integer, the  letter  D  (or  d),  and  an  integer
 exponent with its minus sign or optional plus sign.  The largest
 DOUBLE value is denoted by MAXDOUBLE.  The smallest DOUBLE value
 is  denoted  by  MINDOUBLE.   EPSDOUBLE  denotes  the  result of
 subtracting 1.0d0 from the smallest DOUBLE value that is greater
 than 1.0d0.

 Example:  0D0          
           4.371528665D-3


 On  OpenVMS  VAX  systems,  DOUBLE  exists   in   two   formats:
 D_Floating  and  G_Floating.   On  OpenVMS Alpha and OpenVMS I64
 systems,  DOUBLE   exists   in   three   formats:    D_Floating,
 G_Floating, and IEEE T_Floating.

 To specify a format, you can use either the FLOAT  attribute  or
 the  /FLOAT command line qualifier.  On OpenVMS VAX systems, the
 default format is D_Floating.  On  OpenVMS  Alpha  systems,  the
 default  format  is  G_Floating.   On  OpenVMS  I64, the default
 format is IEEE T_Floating.