NAME
log, logf, logl - natural logarithmic function
SYNOPSIS
#include <math.h>
I double log(double x );
I float logf(float x );
I long double logl(long double x );
Link with
-lm.
DESCRIPTION
The
R log ()
function returns the natural logarithm of x.
ERRORS
The
R log ()
function can return the following 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 requirements.
SEE ALSO
ČLÁNKY DO MAILU