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Data Types
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   (Corresponds to Section 4.1 of ANSI X3.9-1978 FORTRAN 77.)

   GNU Fortran supports these types:

  1. Integer (generic type `INTEGER')

  2. Real (generic type `REAL')

  3. Double precision

  4. Complex (generic type `COMPLEX')

  5. Logical (generic type `LOGICAL')

  6. Character (generic type `CHARACTER')

  7. Double Complex

   (The types numbered 1 through 6 above are standard FORTRAN 77 types.)

   The generic types shown above are referred to in this document using
only their generic type names.  Such references usually indicate that
any specific type (kind) of that generic type is valid.

   For example, a context described in this document as accepting the
`COMPLEX' type also is likely to accept the `DOUBLE COMPLEX' type.

   The GNU Fortran language supports three ways to specify a specific
kind of a generic type.

Double Notation

As in `DOUBLE COMPLEX'.

Star Notation

As in `INTEGER*4'.

Kind Notation

As in `INTEGER(KIND=1)'.