X format descriptor without count field
FORMAT specifications
FORMAT specifications
Q exponent-letter
LOGICAL and INTEGER values
CONVERT specifier
%VAL, %REF and %LOC
_gfortran_set_args — Save command-line arguments
_gfortran_set_options — Set library option flags
_gfortran_set_convert — Set endian conversion
_gfortran_set_record_marker — Set length of record markers
_gfortran_set_fpe — Enable floating point exception traps
_gfortran_set_max_subrecord_length — Set subrecord length
ABORT — Abort the program
ABS — Absolute value
ACCESS — Checks file access modes
ACHAR — Character in ASCII collating sequence
ACOS — Arccosine function
ACOSH — Inverse hyperbolic cosine 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 — Inverse hyperbolic sine function
ASSOCIATED — Status of a pointer or pointer/target pair
ATAN — Arctangent function
ATAN2 — Arctangent function
ATANH — Inverse hyperbolic tangent function
ATOMIC_DEFINE — Setting a variable atomically
ATOMIC_REF — Obtaining the value of a variable atomically
BACKTRACE — Show a backtrace
BESSEL_J0 — Bessel function of the first kind of order 0
BESSEL_J1 — Bessel function of the first kind of order 1
BESSEL_JN — Bessel function of the first kind
BESSEL_Y0 — Bessel function of the second kind of order 0
BESSEL_Y1 — Bessel function of the second kind of order 1
BESSEL_YN — Bessel function of the second kind
BGE — Bitwise greater than or equal to
BGT — Bitwise greater than
BIT_SIZE — Bit size inquiry function
BLE — Bitwise less than or equal to
BLT — Bitwise less than
BTEST — Bit test function
C_ASSOCIATED — Status of a C pointer
C_F_POINTER — Convert C into Fortran pointer
C_F_PROCPOINTER — Convert C into Fortran procedure pointer
C_FUNLOC — Obtain the C address of a procedure
C_LOC — Obtain the C address of an object
C_SIZEOF — Size in bytes of an expression
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
COMPILER_OPTIONS — Options passed to the compiler
COMPILER_VERSION — Compiler version string
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
DIGITS — Significant binary digits function
DIM — Positive difference
DOT_PRODUCT — Dot product function
DPROD — Double product function
DREAL — Double real part function
DSHIFTL — Combined left shift
DSHIFTR — Combined right shift
DTIME — Execution time subroutine (or function)
EOSHIFT — End-off shift elements of an array
EPSILON — Epsilon function
ERF — Error function
ERFC — Error function
ERFC_SCALED — Error function
ETIME — Execution time subroutine (or function)
EXECUTE_COMMAND_LINE — Execute a shell command
EXIT — Exit the program with status.
EXP — Exponential function
EXPONENT — Exponent function
EXTENDS_TYPE_OF — Query dynamic type for extension
FDATE — Get the current time as a string
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
GAMMA — Gamma function
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
HYPOT — Euclidean distance function
IACHAR — Code in ASCII collating sequence
IALL — Bitwise AND of array elements
IAND — Bitwise logical and
IANY — Bitwise OR of array elements
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
IMAGE_INDEX — Function that converts a cosubscript to an image index
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
IPARITY — Bitwise XOR of array elements
IRAND — Integer pseudo-random number
IS_IOSTAT_END — Test for end-of-file value
IS_IOSTAT_EOR — Test for end-of-record value
ISATTY — Whether a unit is a terminal device.
ISHFT — Shift bits
ISHFTC — Shift bits circularly
ISNAN — Test for a NaN
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
LCOBOUND — Lower codimension bounds of an array
LEADZ — Number of leading zero bits of an integer
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 — Natural logarithm function
LOG10 — Base 10 logarithm function
LOG_GAMMA — Logarithm of the Gamma 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
MASKL — Left justified mask
MASKR — Right justified mask
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
MERGE_BITS — Merge of bits under mask
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
NORM2 — Euclidean vector norms
NOT — Logical negation
NULL — Function that returns an disassociated pointer
NUM_IMAGES — Function that returns the number of images
OR — Bitwise logical OR
PACK — Pack an array into an array of rank one
PARITY — Reduction with exclusive OR
PERROR — Print system error message
POPCNT — Number of bits set
POPPAR — Parity of the number of bits set
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
RANK — Rank of a data object
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
SAME_TYPE_AS — Query dynamic types for equality
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_CHAR_KIND — Choose character kind
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
SHIFTA — Right shift with fill
SHIFTL — Left shift
SHIFTR — Right shift
SIGN — Sign copying function
SIGNAL — Signal handling subroutine (or function)
SIN — Sine function
SINH — Hyperbolic sine function
SIZE — Determine the size of an array
SIZEOF — Size in bytes of an expression
SLEEP — Sleep for the specified number of seconds
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
STORAGE_SIZE — Storage size in bits
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
THIS_IMAGE — Function that returns the cosubscript index of this image
TIME — Time function
TIME8 — Time function (64-bit)
TINY — Smallest positive number of a real kind
TRAILZ — Number of trailing zero bits of an integer
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
UCOBOUND — Upper codimension 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 characters not a given set
XOR — Bitwise logical exclusive OR
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