csqrt, csqrtf, csqrtl - complex square root

       For an explanation of the terms used in this section, see attributes(7).
       ┌─────────────────────────────────────────────────────────────────────────────┬───────────────┬─────────┐
       │ Interface                                                                   │ Attribute     │ Value   │
       ├─────────────────────────────────────────────────────────────────────────────┼───────────────┼─────────┤
       │ csqrt(), csqrtf(), csqrtl()                                                 │ Thread safety │ MT-Safe │
       └─────────────────────────────────────────────────────────────────────────────┴───────────────┴─────────┘

       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, ifeps  is
       a small positive real number.)

       glibc 2.1.  C99, POSIX.1-2001.

       Math library (libm, -lm)

       csqrt, csqrtf, csqrtl - complex square root

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

Linux man-pages 6.9.1                              2024-05-02                                           csqrt(3)

       C11, POSIX.1-2008.

#include<complex.h>doublecomplexcsqrt(doublecomplexz);floatcomplexcsqrtf(floatcomplexz);longdoublecomplexcsqrtl(longdoublecomplexz);