Section: complex math routines (3)
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clog, clogf, clogl - natural logarithm of a complex number
double complex clog(double complex z);
float complex clogf(float complex z);
long double complex clogl(long double complex z);
Link with -lm.
The logarithm clog is the inverse function of the exponential cexp.
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).
Please note that z close to zero will cause an overflow.
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linux.jgfs.net manual pages