NAME
clog, clogf,
clogl —
complex natural logarithm
SYNOPSIS
#include
<complex.h>
double complex
clog(double
complex z);
float complex
clogf(float
complex z);
long double complex
clogl(long
double complex z);
DESCRIPTION
The
clog(),
clogf()
and
clogl()
functions compute the complex logarithm to the base
e (2.718...) of z.
If z = x + iy, then
clog(z) = log(sqrt(x^2 + y^2)) + i atan(y / x).
RETURN VALUES
The clog(),
clogf() and clogl()
functions return the complex logarithm to the base e
of z with imaginary part in the interval [-Pi, Pi],
and unbounded real part.
SEE ALSO
STANDARDS
The clog(),
clogf() and clogl()
functions conform to ISO/IEC 9899:1999
(“ISO C99”).