Intrinsic procedures

- abs–Absolute value
- 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
- all–All values in
`MASK`

along`DIM`

are true - allocated–Status of an allocatable entity
- 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_add–Atomic ADD operation
- atomic_and–Atomic bitwise AND operation
- atomic_cas–Atomic compare and swap
- atomic_define–Setting a variable atomically
- atomic_fetch_add–Atomic ADD operation with prior fetch
- atomic_fetch_and–Atomic bitwise AND operation with prior fetch
- atomic_fetch_or–Atomic bitwise OR operation with prior fetch
- atomic_fetch_xor–Atomic bitwise XOR operation with prior fetch
- atomic_or–Atomic bitwise OR operation
- atomic_ref–Obtaining the value of a variable atomically
- atomic_xor–Atomic bitwise OR operation
- 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_funloc–Obtain the C address of a procedure
- c_f_procpointer–Convert C into Fortran procedure pointer
- c_f_pointer–Convert C into Fortran pointer
- 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
- cmplx–Complex conversion function
- co_broadcast–Copy a value to all images the current set of images
- co_max–Maximal value on the current set of images
- co_min–Minimal value on the current set of images
- co_reduce–Reduction of values on the current set of images
- co_sum–Sum of values on the current set of images
- command_argument_count–Get number of command line arguments
- compiler_options–Options passed to the compiler
- compiler_version–Compiler version string
- 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
- date_and_time–Date and time subroutine
- dble–Double conversion function
- digits–Significant digits function
- dim–Positive difference
- dot_product–Dot product function
- dprod–Double product function
- dshiftl–Combined left shift
- dshiftr–Combined right shift
- eoshift–End-off shift elements of an array
- epsilon–Epsilon function
- erf–Error function
- erfc–Complementary error function
- erfc_scaled–Error function
- event_query–Query whether a coarray event has occurred
- execute_command_line–Execute a shell command
- exp–Exponential function
- exponent–Exponent function
- extends_type_of–Type extension inquiry
- float–Convert integer to default real
- floor–Integer floor function
- fraction–Fractional part of the model representation
- gamma–Gamma function
- get_command–Get the entire command line
- get_command_argument–Get command line arguments
- get_environment_variable–Get an environmental variable
- 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
- ibclr–Clear bit
- ibits–Bit extraction
- ibset–Set bit
- ichar–Character-to-integer conversion function
- ieor–Bitwise logical exclusive or
- image_index–Cosubscript to image index conversion
- index–Position of a substring within a string
- int–Convert to integer type
- ior–Bitwise logical inclusive or
- iparity–Bitwise exclusive or of array elements
- is_iostat_end–Test for end-of-file value
- is_iostat_eor–Test for end-of-record value
- ishft–Shift bits
- ishftc–Shift bits circularly
- 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
- lle–Lexical less than or equal
- llt–Lexical less than
- log–Logarithm function
- log10–Base 10 logarithm function
- log_gamma–Logarithm of the Gamma function
- logical–Convert to logical type
- 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
- 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
- not–Logical negation
- norm2–Euclidean vector norm
- null–Function that returns a disassociated pointer
- num_images–Number of images
- pack–Pack an array into an array of rank one
- parity–Reduction with exclusive or
- 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
- random_number–Pseudo-random number
- random_seed–Initialize a pseudo-random number sequence
- range–Decimal exponent range of a real kind
- rank–Rank of a data object
- real–Convert to real type
- repeat–Repeated string concatenation
- reshape–Function to reshape an array
- rrspacing–Reciprocal of the relative spacing
- 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
- 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
- sin–Sine function
- sinh–Hyperbolic sine function
- size–Determine the size of an array
- 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
- storage_size–Storage size in bits
- sum–Sum of array elements
- system_clock–Time function
- tan–Tangent function
- tanh–Hyperbolic tangent function
- this_image–Cosubscript index of this image
- 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
- ubound–Upper dimension bounds of an array
- ucobound–Upper codimension bounds of an array
- unpack–Store the elements of a vector in an array of higher rank
- verify–Scan a string for the absence of a set of characters

*Note*: The descriptions of these intrinsics were originally taken from the GNU Fortran manual. Like the Fortran Wiki itself, the GNU Fortran manual is licensed under the GNU Free Documentation License.

category: intrinsics