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); |
![[Note]](../stylesheet/note.png) |
Note |
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Link with |
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.