PARAMETER attribute
Standard: F77 F90 F95 F2003
  Example Program
type, PARAMETER [ , attr ] :: decl-list

PARAMETER ( name=expr [ , name=expr ]...

In a type declaration statement with the PARAMETER keyword, each decl in the decl-list must supply a value.

Each name must be implicitly typed or have its type specified in a prior type declaration. The type of each expr in a PARAMETER statement must be assignment compatible with its corresponding name.
The PARAMETER attribute specifies that an entity is a named constant. If the type, kind or character length of the expr differs from that of the name, the value is converted using the same rules as intrinsic assignment.
Type Declaration statement