Fortran 77 Language Reference Manual

Table of Contents

Introduction

Intended Audience

Corequisite Publications

Organization of Information

Typographical Conventions

1. Fortran Elements and Concepts

Fortran Character Set

Data Types

Collating Sequence

Symbolic Names

Variables

Source Program Lines

Statements

Program Units

Program Organization

2. Constants and Data Structures

Constants

Character Substrings

Records

Arrays

3. Expressions

Arithmetic Expressions

Character Expressions

Relational Expressions

Logical Expressions

Evaluating Expressions in General

4. Specification Statements

AUTOMATIC, STATIC

BLOCK DATA

COMMON

DATA

Data Type Statements

DIMENSION

EQUIVALENCE

EXTERNAL

IMPLICIT

INTRINSIC

NAMELIST

PARAMETER

POINTER

PROGRAM

RECORD

SAVE

STRUCTURE / UNION

VOLATILE

5. Assignment and Data Statements

Arithmetic Assignment Statements

Logical Assignment Statements

Character Assignment

Aggregate Assignment

ASSIGN

Data Initialization

Implied-DO Lists

6. Control Statements

CALL

CONTINUE

DO

DO WHILE

ELSE

ELSE IF

END

END DO

END IF

GO TO (Unconditional)

GO TO (Computed)

GO TO (Symbolic Name)

IF (Arithmetic)

IF (Branch Logical)

IF (Test Conditional)

PAUSE

RETURN

STOP

7. Input/Output Processing

Records

I/O Statements

Files

Methods of File Access

Units

8. Input/Output Statements

Statement Summary

ACCEPT

BACKSPACE

CLOSE

DECODE

DEFINE FILE

DELETE

ENCODE

ENDFILE

FIND

INQUIRE

OPEN

PRINT or TYPE

READ (Direct Access)

READ (Indexed)

READ (Internal)

READ (Sequential)

REWIND

REWRITE

UNLOCK

WRITE (Direct Access)

WRITE (Indexed)

WRITE (Internal)

WRITE (Sequential)

Control Information List — cilist

Input/Output List — iolist

Data Transfer Rules

9. Format Specification

Format Stored as a Character Entity

FORMAT Statement

Field and Edit Descriptors

Field Descriptor Reference

Edit Descriptor Reference

Complex Data Editing

Interaction Between I/O List and Format

List-Directed Formatting

10. Statement Functions and Subprograms

Overview

Statement Functions

Parameter Passing

Function and Subroutine Subprograms

FUNCTION

SUBROUTINE

ENTRY

INCLUDE

11. Compiler Options

OPTIONS Statement

In-Line Options

$INCLUDE Statement

A. Intrinsic Functions

Generic and Specific Names

Operational Conventions and Restrictions

List of Functions

Index