Retrieves the natural logarithm of a complex number, with a branch cut along the negative real axis.

_Dcomplex clog(   
   _Dcomplex z   
);  
_Fcomplex clog(   
   _Fcomplex z   
);  // C++ only  
_Lcomplex clog(   
   _Lcomplex z   
);  // C++ only  
_Fcomplex clogf(   
   _Fcomplex z   
);  
_Lcomplex clogl(   
   _Lcomplex z   
);  

z
The base of the logarithm.

The natural logarithm of z. The result is unbounded along the real axis and in the interval [-iπ, +iπ] along the imaginary axis.

The possible return values are:

Because C++ allows overloading, you can call overloads of clog that take and return _Fcomplex and _Lcomplex values. In a C program, clog always takes and returns a _Dcomplex value.

For more compatibility information, see Compatibility in the Introduction.

Alphabetical Function Reference
cexp, cexpf, cexpl
cpow, cpowf, cpowl
clog10, clog10f, clog10l