CSQRT(3) - man page online | library functions

Complex square root.

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 nega‐ tive 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 This page is part of release 4.04 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at
2015-04-19 CSQRT(3)
This manual Reference Other manuals
csqrt(3) referred by complex(7) | conj(3) | sqrt(3)
refer to attributes(7) | cabs(3) | cexp(3) | complex(7)