csqrt(3)                   Library Functions Manual                   csqrt(3)

NAME
       csqrt, csqrtf, csqrtl - complex square root

LIBRARY
       Math library (libm, -lm)

SYNOPSIS
       #include <complex.h>

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

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.)

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

       +--------------------------------------------+---------------+---------+
       |Interface                                   | Attribute     | Value   |
       +--------------------------------------------+---------------+---------+
       |csqrt (), csqrtf (), csqrtl ()              | Thread safety | MT-Safe |
       +--------------------------------------------+---------------+---------+
STANDARDS
       C11, POSIX.1-2008.

HISTORY
       glibc 2.1.  C99, POSIX.1-2001.

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

Linux man-pages 6.7               2023-10-31                          csqrt(3)