Standard functions.

A set of standard built-in functions is available and corresponds closely with the Fortran 77 set of intrinsic functions (Table ). Function invocations take the same form as in Fortran and may be nested arbitrarily deeply.

These built-in functions are all generic and will adapt to the type of arithmetic being used. Some, however, do not support integer arithmetic and a bad value will be returned if this is in use (see Table ). There are no data type conversion functions at present.

Table: The standard built-in functions. The angular arguments/results of all trigonometric functions are in radians.

Function	Number of arguments	Description
SQRT	1	square root: $\sqrt{\mbox{arg}}$
LOG	1	natural logarithm: $\ln (\mbox{arg})$
LOG10	1	common logarithm: $\log _{10}(\mbox{arg})$
EXP	1	exponential: $\exp (\mbox{arg})$
ABS	1	absolute (positive) value: $\left\vert \mbox{arg} \right\vert$
NINT	1	nearest integer value to arg
MAX	2 or more	maximum of arguments
MIN	2 or more	minimum of arguments
DIM	2	Fortran DIM (positive difference) function
MOD	2	Fortran MOD (remainder) function
SIGN	2	Fortran SIGN (transfer of sign) function
SIN*	1	sine function: $\sin (\mbox{arg})$
COS*	1	cosine function: $\cos (\mbox{arg})$
TAN*	1	tangent function: $\tan (\mbox{arg})$
ASIN*	1	inverse sine function: $\sin ^{-1}(\mbox{arg})$
ACOS*	1	inverse cosine function: $\cos ^{-1}(\mbox{arg})$
ATAN*	1	inverse tangent function: $\tan ^{-1}(\mbox{arg})$
ATAN2*	2	Fortran ATAN2 (inverse tangent) function
SINH*	1	hyperbolic sine function: $\sinh (\mbox{arg})$
COSH*	1	hyperbolic cosine function: $\cosh (\mbox{arg})$
TANH*	1	hyperbolic tangent function: $\tanh (\mbox{arg})$
	*Function does not support integer arithmetic.