7.3.7.2 The clog functions

Synopsis

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#include <complex.h>
double complex clog(double complex z);
float complex clogf(float complex z);
long double complex clogl(long double complex z);

Description

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The clog functions compute the complex natural (base-e) logarithm of z, with a branch cut along the negative real axis.

Returns

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The clog functions return the complex natural logarithm value, in the range of a strip mathematically unbounded along the real axis and in the interval [-ipi , +ipi ] along the imaginary axis.