clogf(3) - Linux man page
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,pi].One has:
clog(z) = log(cabs(z)) + I * carg(z)Note that z close to zero will cause an overflow.