clog, clogf, clogl — natural logarithm of a complex number
#include <complex.h>
double complex clog( |
double complex | z) ; |
float
complex clogf( |
float complex | z) ; |
long
double complex clogl( |
long double complex | z) ; |
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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.