Index

Symbols

( ): overriding operator precedence
*: CHARACTER length declaration
CHARACTER length declaration with PARAMETER statement
comment
multiplication
standard input or output device
subroutine actual argument
subroutine dummy argument
**: exponentiation
+: addition
carriage control format descriptor
-: minus
subtraction
/: division
record control (new line) format descriptor
//: concatenation
=: assignment
:: scan control format descriptor
substring

A

A: CHARACTER format descriptor
ABS: intrinsic function
ACCESS: use in INQUIRE statement
use in OPEN statement
ACOS: intrinsic function
actual arguments: external functions
statement functions
subroutines
AIMAG: intrinsic function
AINT: intrinsic function
ALOG: intrinsic function
ALOG10: intrinsic function
alternate RETURN: see RETURN
AMOD: intrinsic function
.AND.: Boolean operator
ANINT: intrinsic function
arguments: see actual arguments
see dummy arguments
arithmetic data types: see COMPLEX
see DOUBLE PRECISION
see INTEGER
see REAL
arithmetic IF: see IF
arrays: adjustable size
as arguments
assumed size
bounds
declaration
dimensions
elements
initialisation using DATA
passing sections of arrays to external procedures
storage
ASCII character set: comparing CHARACTER expressions
ASIN: intrinsic function
ASSIGN: assigning a statement label to a variable
assigned GO TO: see GO TO
assignment statement: arithmetic assignment
character assignment
logical assignment
ATAN: intrinsic function
ATAN2: intrinsic function

B

BACKSPACE: backing up one record during data transfer
Backus, John: American programmer and leader of the team which developed FORTRAN
BLANK: use in INQUIRE statement
use in OPEN statement
blank COMMON blocks: see COMMON blocks
blanks: ignored in source code
BLOCK DATA: initialising named COMMON blocks
order in program
block IF: see IF
BN: blank control (blanks as nulls) format descriptor
Boolean data type: see LOGICAL
Boolean values: see .FALSE and .TRUE.
BZ: blank control (blanks as zeros) format descriptor

C

C: comment
CABS: intrinsic function
CALL: calling a subroutine
carriage control characters: FORMAT edit descriptors
CCOS: intrinsic function
CEXP: intrinsic function
CHAR: intrinsic function
CHARACTER: data type
declaration
format data descriptor
character set: limitations
CLOG: intrinsic function
CLOSE: closing a file or other input/output device
CMPLX: intrinsic function
comments: documenting programs
COMMON blocks: blank
dummy arguments of an external procedure
named
order in program
passing information between program units
compilation: compiling and linking
COMPLEX: data type
declaration
format data descriptor
use as a DO loop control variable
computed GO TO: see GO TO
CONJG: intrinsic function
constants: as actual arguments in a procedure reference
see PARAMETER
continuation lines: see statement layout
CONTINUE: use in loops
COS: intrinsic function
COSH: intrinsic function
CSIN: intrinsic function
CSQRT: intrinsic function

D

D: floating point number format descriptor
DABS: intrinsic function
DACOS: intrinsic function
DASIN: intrinsic function
DATA: dummy arguments of an external procedure
initialisation
order in program
use in BLOCK DATA
use in external functions and subroutines
use in the main program
DATAN: intrinsic function
DATAN2: intrinsic function
data types: see CHARACTER
see COMPLEX
see DOUBLE PRECISION
see INTEGER
see LOGICAL
see REAL
DBLE: intrinsic function
DCOS: intrinsic function
DCOSH: intrinsic function
DDIM: intrinsic function
DEXP: intrinsic function
DIM: intrinsic function
DIMENSION: array declaration
order in program
DINT: intrinsic function
DIRECT: use in INQUIRE statement
direct-access files: using in a program
DLOG: intrinsic function
DLOG10: intrinsic function
DMOD: intrinsic function
DNINT: intrinsic function
DO: loops
nesting
DOUBLE PRECISION: data type
declaration
format data descriptor
use as a DO loop control variable
do-while loop: DO WHILE
see loops
DPROD: intrinsic function
DSIGN: intrinsic function
DSIN: intrinsic function
DSINH: intrinsic function
DSQRT: intrinsic function
DTAN: intrinsic function
DTANH: intrinsic function
dummy arguments: external functions
intrinsic functions
statement functions
subroutines

E

E: floating point number format descriptor
EBCDIC character set: comparing CHARACTER expressions
ELSE: see IF
ELSE IF: see IF
END: order in program
stopping program execution
use in READ statement
use in WRITE statement
END DO: use in DO loop
use in DO WHILE loop
END IF: see IF
ENTRY: alternate entry into external procedures
.EQ.: relational operator
EQUIVALENCE: declaration
dummy arguments of an external procedure
order in program
.EQV.: relational operator
ERR: use in BACKSPACE statement
use in CLOSE statement
use in INQUIRE statement
use in OPEN statement
use in READ statement
use in REWIND statement
use in WRITE statement
exclusive or: see .NEQV.
EXIST: use in INQUIRE statement
EXP: intrinsic function
exponential notation: compare with scientific notation
expressions: as actual arguments in a procedure reference
EXTERNAL: ensuring BLOCK DATA linkage
name conflict between intrinsic and user-defined functions
order in program
external procedure as an actual argument
external files: using in a program

F

F: floating point number format descriptor
fixed point data type: see INTEGER
.FALSE.: Boolean value
appearance in truth tables
files: input/output
FILE: use in INQUIRE statement
use in OPEN statement
floating point data type: see COMPLEX
see DOUBLE PRECISION
see REAL
FMT: use in READ statement
use in WRITE statement
FORM: use in INQUIRE statement
use in OPEN statement
FORMAT: descriptors
forced reversion
order in program
use with READ statement
use with WRITE statement
FORMATTED: use in INQUIRE statement
FORTRAN: history of the development of FORTRAN
FORTRAN II: history of the development of FORTRAN
FORTRAN IV: history of the development of FORTRAN
FORTRAN 66: history of the development of FORTRAN
FORTRAN 77: history of the development of FORTRAN
FORTRAN 8X: history of the development of FORTRAN
FORTRAN 90: history of the development of FORTRAN
FUNCTION: external function
order in program
functions: external functions
intrinsic functions
statement functions
see FUNCTION

G

G: floating point number format descriptor
.GE.: relational operator
generic function name: intrinsic function
GO TO: assigned GO TO
computed GO TO
transferring out of a DO loop
transferring out of an IF block
unconditional GO TO
use in do-while and repeat-until loops
.GT.: relational operator

H

H: Hollerith string format descriptor
Hollerith, Herman: American inventer

I

I: fixed point number format descriptor
IABS: intrinsic function
ICHAR: intrinsic function
IDIM: intrinsic function
IDNINT: intrinsic function
IF: arithmetic IF
block IF
logical IF
nesting
use in do-while and repeat-until loops
IMPLICIT: IMPLICIT NONE
order in program
variable declaration
implied DO loop: use in DATA statement
use in READ statement
use in WRITE statement
INCLUDE: including separate text files into source code
INDEX: intrinsic function
initialisation: using assignment operator
using BLOCK DATA
using DATA
using PARAMETER
input/output: binary input/output
direct-access input/output
formatted input/output
sequential-access input/output
unformatted input/output
see BACKSPACE
see CLOSE
see FORMAT
see INQUIRE
see OPEN
see PRINT
see READ
see REWIND
see WRITE
INQUIRE: getting information on files and unit numbers
INT: intrinsic function
INTEGER: data type
declaration
format data descriptor
use as a DO loop control variable
internal file: using in a program
INTRINSIC: intrinsic function as an actual argument
intrinsic function as an actual argument
order in program
intrinsic functions: see functions
I/O: see input/output
IOSTAT: use in BACKSPACE statement
use in CLOSE statement
use in INQUIRE statement
use in OPEN statement
use in READ statement
use in REWIND statement
use in WRITE statement
ISIGN: intrinsic function

K

K: scaling factor format descriptor

L

labels: see statement layout
L: LOGICAL format descriptor
.LE.: relational operator
LEN: intrinsic function
LGE: intrinsic function
LGT: intrinsic function
libraries: compiling and linking
linking: compiling and linking
list-directed formatting: general rules
LLE: intrinsic function
LLT: intrinsic function
LOG: intrinsic function
LOG10: intrinsic function
LOGICAL: data type
declaration
format data descriptor
logical IF: see IF
loops: do-while
repeat-until
see DO
see implied DO loop
.LT.: relational operator

M

MAX: intrinsic function
MIN: intrinsic function
MOD: intrinsic function

N

NAME: use in INQUIRE statement
NAMED: use in INQUIRE statement
named COMMON blocks: see COMMON blocks
.NE.: relational operator
.NEQV.: relational operator
NEXTREC: use in INQUIRE statement
NINT: intrinsic function
.NOT.: Boolean operator
NUMBER: use in INQUIRE statement

O

object file: compiling and linking
OPEN: opening a file or other input/output device
OPENED: use in INQUIRE statement
operator precedence: arithmetic operators
Boolean operators
overriding operator precedence
relational operators
.OR.: Boolean operator

P

PARAMETER: initialising constants
order in program
PAUSE: pausing program execution
procedures: external functions
intrinsic functions
subroutines
PROGRAM: first statement in main program
order in program
PRINT: simplified WRITE statement

R

READ: reading information from a file or other input device
REAL: data type
declaration
format data descriptor
intrinsic function
use as a DO loop control variable
REC: use in READ statement
use in WRITE statement
RECL: use in INQUIRE statement
use in OPEN statement
recursion: not allowed
repeat-until loop: see loops
reserved words: none in FORTRAN 77
RETURN: transfer of control from procedure back to calling program unit
REWIND: backing up to the first record during data transfer

S

S: sign control format descriptor
SAVE: dummy arguments of an external procedure
order in program
saving information in named COMMON blocks
saving local variables in an external procedure
scientific notation: compare with exponential notation
SEQUENTIAL: use in INQUIRE statement
sequential-access files: using in a program
side effects: external functions
SIGN: intrinsic function
SIN: intrinsic function
SINH: intrinsic function
source file: compiling and linking
SP: sign control (force + sign) format descriptor
specific function name: intrinsic function
SQRT: intrinsic function
SS: sign control (suppress + sign) format descriptor
statement functions: see functions
statement layout: card sequence field
continuation field
label field
statement field
STATUS: use in OPEN statement
STOP: stopping program execution
SUBROUTINE: order in program
subroutines
substrings: CHARACTER operators
symbolic names: valid and invalid names

T

T: position control (tab) format descriptor
TAN: intrinsic function
TANH: intrinsic function
THEN: see IF
TL: position control (tab left) format descriptor
TR: position control (tab right) format descriptor
.TRUE.: Boolean value
appearance in truth tables

U

UNFORMATTED: use in INQUIRE statement
UNIT: use in BACKSPACE statement
use in CLOSE statement
use in INQUIRE statement
use in OPEN statement
use in READ statement
use in REWIND statement
use in WRITE statement
unit number: identifying input/output device

V

variables: initialisation with assignment operator
initialisation with DATA

W

WRITE: writing information to a file or other output device

X

X: position control (spacing) format descriptor