cbrt - Online Linux Manual PageSection : 3
Updated : 2023-02-05
Source : Linux man-pages 6.03

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NAMEcbrt, cbrtf, cbrtl − cube root function

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LIBRARYMath library (libm, −lm)

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SYNOPSIS#include <math.h>double cbrt(double x); float cbrtf(float x); long double cbrtl(long double x);Feature Test Macro Requirements for glibc (see feature_test_macros(7)): cbrt(): _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L || _XOPEN_SOURCE >= 500 || /* Since glibc 2.19: */ _DEFAULT_SOURCE || /* glibc <= 2.19: */ _BSD_SOURCE || _SVID_SOURCEcbrtf(), cbrtl(): _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L || /* Since glibc 2.19: */ _DEFAULT_SOURCE || /* glibc <= 2.19: */ _BSD_SOURCE || _SVID_SOURCE

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DESCRIPTIONThese functions return the (real) cube root of x. This function cannot fail; every representable real value has a representable real cube root.

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RETURN VALUEThese functions return the cube root of x. If x is +0, −0, positive infinity, negative infinity, or NaN, x is returned.

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ERRORSNo errors occur.

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ATTRIBUTESFor an explanation of the terms used in this section, see attributes(7). InterfaceAttributeValue cbrt(), cbrtf(), cbrtl() Thread safetyMT-Safe

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STANDARDSC99, POSIX.1-2001, POSIX.1-2008.

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SEE ALSOpow(3), sqrt(3) 0

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