cbrt man page

cbrt, cbrtf, cbrtl — cube root function

Synopsis

#include <math.h>

double cbrt(double x);

float cbrtf(float x);

long double cbrtl(long double x);

Link with -lm.

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 versions <= 2.19: */ _BSD_SOURCE || _SVID_SOURCE

cbrtf(), cbrtl():

_ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L
|| /* Since glibc 2.19: */ _DEFAULT_SOURCE
|| /* Glibc versions <= 2.19: */ _BSD_SOURCE || _SVID_SOURCE

Description

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

Return Value

These functions return the cube root of x.

If x is +0, -0, positive infinity, negative infinity, or NaN, x is returned.

Errors

No errors occur.

Attributes

For an explanation of the terms used in this section, see attributes(7).

InterfaceAttributeValue
cbrt(), cbrtf(), cbrtl()Thread safetyMT-Safe

Conforming to

C99, POSIX.1-2001, POSIX.1-2008.

See Also

pow(3), sqrt(3)

Colophon

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Referenced By

exp(3), exp10(3), exp2(3), log(3), log10(3), log2(3), pow(3), sqrt(3).

cbrtf(3) and cbrtl(3) are aliases of cbrt(3).

2016-03-15 GNU Linux Programmer's Manual