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.) VERSIONS These functions were added in glibc 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 │ └─────────────────────────────────────────────────────────────────────────────────────────────────┴───────────────┴─────────┘ STANDARDS C99, POSIX.1-2001, POSIX.1-2008. SEE ALSO cabs(3), cexp(3), complex(7) Linux man-pages 6.03 2022-12-15 csqrt(3)