LOG(3) Linux Programmers Manual LOG(3)
NAME
log, logf, logl  natural logarithmic function
SYNOPSIS
#include
double log(double x);
float logf(float x);
long double logl(long double x);
Link with lm.
DESCRIPTION
The log() function returns the natural logarithm of x.
ERRORS
EDOM The argument x is negative.
ERANGE The argument x is zero. The log of zero is not defined (minus
infinity).
CONFORMING TO
SVr4, 4.3BSD, C89. The float and long double variants are C99 require
ments.
SEE ALSO
cbrt(3), clog(3), log1p(3), sqrt(3)
COLOPHON
This page is part of release 3.05 of the Linux manpages project. A
description of the project, and information about reporting bugs, can
be found at http://www.kernel.org/doc/manpages/.
20080715 LOG(3)
