# clog(3) [linux man page]

CLOG(3) Linux Programmer's Manual CLOG(3)NAME

clog, clogf, clogl - natural logarithm of a complex numberSYNOPSIS

#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]. One has: clog(z) = log(cabs(z)) + I * carg(z) Note that z close to zero will cause an overflow.-piVERSIONS

These functions first appeared in glibc in version 2.1.CONFORMING TO

C99.SEE ALSO

cabs(3), cexp(3), clog10(3), complex(7)COLOPHON

This page is part of release 3.27 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/. 2008-08-11 CLOG(3)

## Check Out this Related Man Page

CLOG(3) Linux Programmer's Manual CLOG(3)NAME

clog, clogf, clogl - natural logarithm of a complex numberSYNOPSIS

#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]. One has: clog(z) = log(cabs(z)) + I * carg(z) Note that z close to zero will cause an overflow.-piVERSIONS

These functions first appeared in glibc in version 2.1.CONFORMING TO

C99.SEE ALSO

cabs(3), cexp(3), clog10(3), complex(7)COLOPHON

This page is part of release 3.25 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/. 2008-08-11 CLOG(3)