exp(3M)

NAME | SYNOPSIS | DESCRIPTION | RETURN VALUES | ERRORS | USAGE | ATTRIBUTES | SEE ALSO | NOTES

NAME

exp– exponential function

SYNOPSIS

cc [ flag ... ] file ... -lm [ library ... ]
#include <math.h>

double exp(double x);

DESCRIPTION

The exp() function computes the exponential of x, defined as e^x.

RETURN VALUES

Upon successful completion, exp() returns the exponential of x.

If the correct value would cause overflow, exp() returns HUGE_VAL and sets errno to ERANGE.

If the correct value would cause underflow to zero, exp() returns 0 and may set errno to ERANGE.

If x is NaN, NaN is returned.

For exceptional cases, matherr(3M) tabulates the values to be returned as dictated by Standards other than XPG4.

ERRORS

The exp() function will fail if:

ERANGE

The result overflows.

The exp() function may fail if:

ERANGE

The result underflows.

USAGE

An application wishing to check for error situations should set errno to 0 before calling exp(). If errno is non-zero on return, or the return value is NaN an error has occurred.

ATTRIBUTES

See attributes(5) for descriptions of the following attributes:

ATTRIBUTE TYPE	ATTRIBUTE VALUE
MT-Level	MT-Safe

SEE ALSO

isnan(3M), log(3M), matherr(3M), mp(3MP), attributes(5), standards(5)

NOTES

Prior to Solaris 2.6, there was a conflict between the pow function in this library and the pow function in the libmp library. This conflict was resolved by prepending mp_ to all functions in the libmp library. See mp(3MP) for details.

SunOS 5.9  Last Revised 29 Dec 1996

NAME | SYNOPSIS | DESCRIPTION | RETURN VALUES | ERRORS | USAGE | ATTRIBUTES | SEE ALSO | NOTES