CSQRT(3) Linux Programmer's Manual CSQRT(3)

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

     These  functions  calculate the complex square root of z, 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.

ATTRIBUTES

     For  an  explanation  of  the  terms  used   in   this   section,   see
     attributes(7).

     +----------------------------+---------------+---------+
     |Interface                   | Attribute     | Value   |
     +----------------------------+---------------+---------+
     |csqrt(), csqrtf(), csqrtl() | Thread safety | MT-Safe |
     +----------------------------+---------------+---------+

CONFORMING TO

     C99, POSIX.1-2001, POSIX.1-2008.

SEE ALSO

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

COLOPHON

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                                2017-09-15                          CSQRT(3)