csqrt(3) — Linux manual page

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)

COLOPHON

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

Pages that refer to this page: conj(3), sqrt(3), complex(7)

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