Section 13: 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 Statement                         |
 |       |--------------------------------------------------------|
 |       |PROGRAM, FUNCTION, SUBROUTINE, or BLOCK DATA Statements |
 |       |--------+-----------------------------------------------|
 |COMMENT|         |  IMPLICIT NONE Statement                     |
 | Lines,|         |-------------------------------+--------------|
 |INCLUDE|NAMELIST,|  IMPLICIT Statements          |              |
 | State-| FORMAT, |------+------------------------|  PARAMETER   |
 | ments,|   &     |      |  Other Specification   |  Statements  |
 |& Gen- | ENTRY   | DATA |      Statements,       |              |
 |  eral | State-  |State-|  DICTIONARY Statements |              |
 |Direc- |  ments  | ments|------------------------+--------------|
 | tives |         |      |   Statement Function Definitions      |
 |       |         |      |---------------------------------------|
 |       |         |      |       Executable Statements           |
 |-------+---------+------+---------------------------------------|
 |                     END Statement                              |
 +----------------------------------------------------------------+

Sub-Topics

1. Directive_Statements
2. Executable_Statements
3. Specification_Statements
4. ACCEPT
5. ASSERT
6. ASSIGN
7. Assignment
8. AUTOMATIC_and_STATIC
9. BACKSPACE
10. BLOCK_DATA
11. CALL
12. CLOSE
13. COMMON
14. CONTINUE
15. DATA
16. DELETE
17. DIMENSION
18. DO
19. DO_WHILE
20. ELSE
21. ELSE_IF
22. END
23. END_DO
24. END_MAP
25. END_STRUCTURE
26. END_UNION
27. ENDFILE
28. END_IF
29. ENTRY
30. EQUIVALENCE
31. EXTERNAL
32. FORMAT
33. FUNCTION
34. Function_Reference
35. GOTO
36. IF
37. IMPLICIT
38. IMPLICIT_NONE
39. INCLUDE
40. Input_Output
41. INQUIRE
42. INTRINSIC
43. MAP
44. NAMELIST
45. OPEN
46. OPTIONS
47. PARAMETER
48. PAUSE
49. POINTER
50. PRINT
51. PROGRAM
52. READ
53. RECORD
54. RETURN
55. REWIND
56. REWRITE
57. SAVE
58. Statement_Function
59. STOP
60. STRUCTURE
61. SUBROUTINE
62. TYPE
63. Type_declaration
64. UNION
65. UNLOCK
66. VOLATILE
67. WRITE