EXP

NAME
SYNOPSIS
DESCRIPTION
ERRORS
CONFORMING TO
SEE ALSO

NAME

exp, log, log10, pow − exponential, logarithmic and power functions

SYNOPSIS

#include <math.h>

double exp(double x);

double log(double x);

double log10(double x);

double pow(double x, double y);

DESCRIPTION

The exp() function returns the value of e (the base of natural logarithms) raised to the power of x.

The log() function returns the natural logarithm of x.

The log10() function returns the base-10 logarithm of x.

The pow() function returns the value of x raised to the power of y.

ERRORS

The log() and log10() functions can return the following errors:

EDOM

The argument x is negative.

ERANGE

The argument x is zero. The log of zero is not defined.

The pow() function can return the following error:

EDOM

The argument x is negative and y is not an integral value. This would result in a complex number.

CONFORMING TO

SVID 3, POSIX, BSD 4.3, ISO 9899

SEE ALSO

sqrt(3), cbrt(3)