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csqrt(3) Library Functions Manual csqrt(3)
csqrt, csqrtf, csqrtl - complex square root
Math library (libm, -lm)
#include <complex.h> double complex csqrt(double complex z); float complex csqrtf(float complex z); long double complex csqrtl(long double complex z);
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.)
For an explanation of the terms used in this section, see attributes(7). ┌──────────────────────────────────────┬───────────────┬─────────┐ │Interface │ Attribute │ Value │ ├──────────────────────────────────────┼───────────────┼─────────┤ │csqrt(), csqrtf(), csqrtl() │ Thread safety │ MT-Safe │ └──────────────────────────────────────┴───────────────┴─────────┘
C11, POSIX.1-2008.
glibc 2.1. C99, POSIX.1-2001.
cabs(3), cexp(3), complex(7)
Linux man-pages 6.04 2023-03-30 csqrt(3)
Pages that refer to this page: conj(3), sqrt(3), complex(7)