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.

VERSIONS

These functions first appeared in glibc in version 2.1.

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/.