clogf, clog, clogl
From cppreference.com
Defined in header <complex.h>


(since C99)  
(since C99)  
(since C99)  
Computes the complex natural (basee) logarithm of z
with branch cut along the negative real axis.
Contents 
Parameters
z    complex argument 
Return value
The complex natural logarithm of z
in the interval (−∞; +∞) along the real axis and in the interval (−iπ; +iπ) along the imaginary axis.
Example
This section is incomplete Reason: no example 
See also
(C99)(C99)(C99) 
computes the complex basee exponential (function) 