clog

CLOG(3)			    complex math routines		      CLOG(3)



NAME
       clog, clogf, clogl - natural logarithm of a complex number

SYNOPSIS
       #include <complex.h>

       double complex clog(double complexz);

       float complex clogf(float complex z);

       long double complex clogl(long double complexz);


DESCRIPTION
       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 [-I*pi,I*pi].

       One has clog(z) = log(cabs(z))+I*carg(z).

       Please note that z close to zero will cause an overflow.

CONFORMING TO
       C99

SEE ALSO
       cabs(3), cexp(3), clog10(3)



				  2002-07-28			      CLOG(3)