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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 3.35 of the Linux man-pages project.  A description of the
       project, and information about reporting bugs, can be found at  http://man7.org/linux/man-
       pages/.

                                            2008-08-11                                   CSQRT(3)