Next: Subroutine Syntax
Up: Program Units
Previous: SAVE Attribute and the
Fortran 90 allows a class of procedure that is not contained within a
PROGRAM or a MODULE -- an EXTERNAL procedure.
This is the old FORTRAN 77-style of programming and is more clumsy than the
Fortran 90 way.
Differences:
- they may be compiled separately,
- may need an explicit INTERFACE to be supplied to the calling program,
- can be used as arguments (in addition to intrinsics),
- should contain the IMPLICIT NONE specifier.
For more information, click here 
Next: Subroutine Syntax
Up: Program Units
Previous: SAVE Attribute and the
©University of Liverpool, 1997
Wed May 28 23:37:18 BST 1997Not for commercial use.