VMS Help  —  FORTRAN  Statements
  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                              |
  +----------------------------------------------------------------+
Additional Information: explode extract
Directives ACCEPT ALLOCATABLE ALLOCATE ASSIGN Assignment AUTOMATIC and STATIC BACKSPACE BLOCK_DATA CALL CASE CLOSE COMMON CONTAINS CONTINUE CYCLE DATA DEALLOCATE DECODE DEFINE_FILE DELETE DIMENSION DO DO_WHILE ELSE ELSE_IF ELSEWHERE ENCODE END END_DO END_IF END_MAP END_SELECT END_STRUCTURE END_TYPE END_UNION ENDFILE ENTRY EQUIVALENCE EXIT EXTERNAL FIND FORALL FORMAT FUNCTION GOTO IF IMPLICIT IMPLICIT_NONE INCLUDE Input Output INQUIRE INTENT INTERFACE INTRINSIC MAP MODULE MODULE_PROCEDURE NAMELIST NULLIFY OPEN OPTIONAL OPTIONS PARAMETER PAUSE POINTER PRINT PRIVATE and PUBLIC PROGRAM READ RECORD RETURN REWIND REWRITE SAVE Statement Function SELECT_CASE SEQUENCE STOP STRUCTURE SUBROUTINE TARGET TYPE Type declaration UNION UNLOCK USE VIRTUAL VOLATILE WHERE WRITE
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