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VMS Help FORTRAN, Statements *Conan The Librarian |
Statements in a Fortran program unit follow a required order. In the following figure, vertical lines separate statement types that can be interspersed. For example, DATA statements can be interspersed with executable statements. Horizontal lines indicate statement types that cannot be interspersed. For example, type declaration statements cannot be interspersed with executable statements. +-------+--------------------------------------------------------+ | | OPTIONS Statements | | |--------------------------------------------------------| | | PROGRAM, FUNCTION, SUBROUTINE, MODULE, or | | | BLOCK DATA Statements | | |--------------------------------------------------------| | | USE Statements | | |---------+----------------------------------------------| |COMMENT| | IMPLICIT NONE Statements | | Lines,| |------------+-------------------+-------------| |INCLUDE|NAMELIST,| PARAMETER | IMPLICIT Statements | |State- | FORMAT, |------------+---------------------------------| | ments,| & | | Derived-Type Definitions, | | & | ENTRY | PARAMETER | Interface Blocks, Type | |Direc- | State- | and DATA | Declaration Statements, State- | | tives | ments | Statements | ment Function Statements, and | | | | | Specification Statements | | | +------------+---------------------------------| | | | DATA | Executable Statements | | | | Statements | | | |---------+----------------------------------------------| | | CONTAINS Statement | | |--------------------------------------------------------| | | Internal Subprograms or Module Subprograms | |-------+--------------------------------------------------------| | END Statement | +----------------------------------------------------------------+
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