ABORT — Abort the program ABS — Absolute value ACHAR — Character in ASCII collating sequence ACOS — Arc cosine function ADJUSTL — Left adjust a string ADJUSTR — Right adjust a string AIMAG — Imaginary part of complex number AINT — Imaginary part of complex number ALL — All values in MASK along DIM are true ALLOCATED — Status of an allocatable entity ANINT — Imaginary part of complex number ANY — Any value in MASK along DIM is true ASIN — Arcsine function ASSOCIATED — Status of a pointer or pointer/target pair ATAN — Arctangent function ATAN2 — 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 CMPLX — Complex conversion function COMMAND_ARGUMENT_COUNT — Argument count 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 function 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 — Dim function DOT_PRODUCT — Dot product function DPROD — Double product function DREAL — Double real part function DTIME — Execution time subroutine (or function) EOSHIFT — End-off shift function 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 FLOOR — Integer floor function FNUM — File number function LOG — Logarithm function LOG10 — Base 10 logarithm function SECNDS — Time subroutine SIN — Sine function SINH — Hyperbolic sine function SQRT — Square-root function TAN — Tangent function TANH — Hyperbolic tangent function This manual documents the use of gfortran, the GNU Fortran 95 compiler. You can find in this manual how to invoke gfortran, as well as its features and incompatibilities.