Cbrtl (3) Linux Manual 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).

Interface	Attribute	Value
cbrt(), cbrtf(), cbrtl()	Thread safety	MT-Safe

Conforming To

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

Colophon

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cbrtl (3) Linux Manual Page