NAME

       csqrt, csqrtf, csqrtl - complex square root

SYNOPSIS

       #include <complex.h>

       double complex csqrt(double complex z);
       float complex csqrtf(float complex z);
       long double complex csqrtl(long double complex z);

       Link with -lm.

DESCRIPTION

       Calculate  the  square  root of a given complex number, with nonnegative real part, and with a branch cut
       along the negative real axis.  (That means that csqrt(-1+eps*I) will be close to I while  csqrt(-1-eps*I)
       will be close to -I, if eps is a small positive real number.)

VERSIONS

       These functions first appeared in glibc in version 2.1.

CONFORMING TO

       C99.

SEE ALSO

       cabs(3), cexp(3), complex(7)

COLOPHON

       This  page  is  part  of  release 3.54 of the Linux man-pages project.  A description of the project, and
       information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.

                                                   2008-08-11                                           CSQRT(3)