CBRT

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUE
ERRORS
ATTRIBUTES
CONFORMING TO
SEE ALSO
COLOPHON

NAME

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():

_BSD_SOURCE || _SVID_SOURCE || _XOPEN_SOURCE >= 500 || _XOPEN_SOURCE && _XOPEN_SOURCE_EXTENDED || _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L;
or cc -std=c99

cbrtf(), cbrtl():

_BSD_SOURCE || _SVID_SOURCE || _XOPEN_SOURCE >= 600 || _ISOC99_SOURCE || _POSIX_C_SOUCE >= 200112L;
or cc -std=c99

DESCRIPTION

The cbrt() function returns 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).

Image grohtml-55201.png

CONFORMING TO

C99, POSIX.1-2001.

SEE ALSO

pow(3), sqrt(3)

COLOPHON

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