CLOG(3) Linux Programmer's Manual CLOG(3)
NAME
clog, clogf, clogl  natural logarithm of a complex number
SYNOPSIS
#include <<complex.h>>
double complex clog(double complex z);
float complex clogf(float complex z);
long double complex clogl(long double complex z);
Link with lm.
DESCRIPTION
The logarithm clog() is the inverse function of the exponential
cexp(3). Thus, if y = clog(z), then z = cexp(y). The imaginary part
of y is chosen in the interval [pi,pi].
One has:
clog(z) = log(cabs(z)) + I * carg(z)
Note that z close to zero will cause an overflow.
CONFORMING TO
C99.
SEE ALSO
cabs(3), cexp(3), clog10(3), complex(7)
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/.
20071226 CLOG(3)
