X format descriptor without count field FORMAT specifications FORMAT specifications LOGICAL and INTEGER values ABORT — Abort the program ABS — Absolute value ACCESS — Checks file access modes ACHAR — Character in ASCII collating sequence ACOS — Arccosine function ACOSH — Hyperbolic arccosine function ADJUSTL — Left adjust a string ADJUSTR — Right adjust a string AIMAG — Imaginary part of complex number AINT — Truncate to a whole number ALARM — Execute a routine after a given delay ALL — All values in MASK along DIM are true ALLOCATED — Status of an allocatable entity AND — Bitwise logical AND ANINT — Nearest whole number ANY — Any value in MASK along DIM is true ASIN — Arcsine function ASINH — Hyperbolic arcsine function ASSOCIATED — Status of a pointer or pointer/target pair ATAN — Arctangent function ATAN2 — Arctangent function ATANH — Hyperbolic arctangent function BESJ0 — Bessel function of the first kind of order 0 BESJ1 — Bessel function of the first kind of order 1 BESJN — Bessel function of the first kind BESY0 — Bessel function of the second kind of order 0 BESY1 — Bessel function of the second kind of order 1 BESYN — Bessel function of the second kind BIT_SIZE — Bit size inquiry function BTEST — Bit test function CEILING — Integer ceiling function CHAR — Character conversion function CHDIR — Change working directory CHMOD — Change access permissions of files CMPLX — Complex conversion function COMMAND_ARGUMENT_COUNT — Get number of command line arguments COMPLEX — Complex conversion function CONJG — Complex conjugate function COS — Cosine function COSH — Hyperbolic cosine function COUNT — Count function CPU_TIME — CPU elapsed time in seconds CSHIFT — Circular shift elements of an array CTIME — Convert a time into a string DATE_AND_TIME — Date and time subroutine DBLE — Double conversion function DCMPLX — Double complex conversion function DFLOAT — Double conversion function DIGITS — Significant digits function DIM — Positive difference DOT_PRODUCT — Dot product function DPROD — Double product function DREAL — Double real part function DTIME — Execution time subroutine (or function) EOSHIFT — End-off shift elements of an array EPSILON — Epsilon function ERF — Error function ERFC — Error function ETIME — Execution time subroutine (or function) EXIT — Exit the program with status. EXP — Exponential function EXPONENT — Exponent function FDATE — Get the current time as a string FLOAT — Convert integer to default real FGET — Read a single character in stream mode from stdin FGETC — Read a single character in stream mode FLOOR — Integer floor function FLUSH — Flush I/O unit(s) FNUM — File number function FPUT — Write a single character in stream mode to stdout FPUTC — Write a single character in stream mode FRACTION — Fractional part of the model representation FREE — Frees memory FSEEK — Low level file positioning subroutine FSTAT — Get file status FTELL — Current stream position GERROR — Get last system error message GETARG — Get command line arguments GET_COMMAND — Get the entire command line GET_COMMAND_ARGUMENT — Get command line arguments GETCWD — Get current working directory GETENV — Get an environmental variable GET_ENVIRONMENT_VARIABLE — Get an environmental variable GETGID — Group ID function GETLOG — Get login name GETPID — Process ID function GETUID — User ID function GMTIME — Convert time to GMT info HOSTNM — Get system host name HUGE — Largest number of a kind IACHAR — Code in ASCII collating sequence IAND — Bitwise logical and IARGC — Get the number of command line arguments IBCLR — Clear bit IBITS — Bit extraction IBSET — Set bit ICHAR — Character-to-integer conversion function IDATE — Get current local time subroutine (day/month/year) IEOR — Bitwise logical exclusive or IERRNO — Get the last system error number INDEX — Position of a substring within a string INT — Convert to integer type INT2 — Convert to 16-bit integer type INT8 — Convert to 64-bit integer type IOR — Bitwise logical or IRAND — Integer pseudo-random number ISATTY — Whether a unit is a terminal device. ISHFT — Shift bits ISHFTC — Shift bits circularly ITIME — Get current local time subroutine (hour/minutes/seconds) KILL — Send a signal to a process KIND — Kind of an entity LBOUND — Lower dimension bounds of an array LEN — Length of a character entity LEN_TRIM — Length of a character entity without trailing blank characters LGE — Lexical greater than or equal LGT — Lexical greater than LINK — Create a hard link LLE — Lexical less than or equal LLT — Lexical less than LNBLNK — Index of the last non-blank character in a string LOC — Returns the address of a variable LOG — Logarithm function LOG10 — Base 10 logarithm function LOGICAL — Convert to logical type LONG — Convert to integer type LSHIFT — Left shift bits LSTAT — Get file status LTIME — Convert time to local time info MALLOC — Allocate dynamic memory MATMUL — matrix multiplication MAX — Maximum value of an argument list MAXEXPONENT — Maximum exponent of a real kind MAXLOC — Location of the maximum value within an array MAXVAL — Maximum value of an array MCLOCK — Time function MCLOCK8 — Time function (64-bit) MERGE — Merge variables MIN — Minimum value of an argument list MINEXPONENT — Minimum exponent of a real kind MINLOC — Location of the minimum value within an array MINVAL — Minimum value of an array MOD — Remainder function MODULO — Modulo function MOVE_ALLOC — Move allocation from one object to another MVBITS — Move bits from one integer to another NEAREST — Nearest representable number NEW_LINE — New line character NINT — Nearest whole number NOT — Logical negation NULL — Function that returns an disassociated pointer OR — Bitwise logical OR PACK — Pack an array into an array of rank one PERROR — Print system error message PRECISION — Decimal precision of a real kind PRESENT — Determine whether an optional dummy argument is specified PRODUCT — Product of array elements RADIX — Base of a model number RAN — Real pseudo-random number RAND — Real pseudo-random number RANDOM_NUMBER — Pseudo-random number RANDOM_SEED — Initialize a pseudo-random number sequence RANGE — Decimal exponent range of a real kind REAL — Convert to real type RENAME — Rename a file REPEAT — Repeated string concatenation RESHAPE — Function to reshape an array RRSPACING — Reciprocal of the relative spacing RSHIFT — Right shift bits SCALE — Scale a real value SCAN — Scan a string for the presence of a set of characters SECNDS — Time function SECOND — CPU time function SELECTED_INT_KIND — Choose integer kind SELECTED_REAL_KIND — Choose real kind SET_EXPONENT — Set the exponent of the model SHAPE — Determine the shape of an array SIGN — Sign copying function SIGNAL — Signal handling subroutine (or function) SIN — Sine function SINH — Hyperbolic sine function SIZE — Determine the size of an array SLEEP — Sleep for the specified number of seconds SNGL — Convert double precision real to default real SPACING — Smallest distance between two numbers of a given type SPREAD — Add a dimension to an array SQRT — Square-root function SRAND — Reinitialize the random number generator STAT — Get file status SUM — Sum of array elements SYMLNK — Create a symbolic link SYSTEM — Execute a shell command SYSTEM_CLOCK — Time function TAN — Tangent function TANH — Hyperbolic tangent function TIME — Time function TIME8 — Time function (64-bit) TINY — Smallest positive number of a real kind TRANSFER — Transfer bit patterns TRANSPOSE — Transpose an array of rank two TRIM — Remove trailing blank characters of a string TTYNAM — Get the name of a terminal device. UBOUND — Upper dimension bounds of an array UMASK — Set the file creation mask UNLINK — Remove a file from the file system UNPACK — Unpack an array of rank one into an array VERIFY — Scan a string for the absence of a set of characters XOR — Bitwise logical exclusive OR Next: Introduction, Up: (dir)
This manual documents the use of gfortran, the GNU Fortran compiler. You can find in this manual how to invoke gfortran, as well as its features and incompatibilities.
Part I: Invoking GNU Fortran
Part II: Language Reference