[Go to CFHT Home Page] Man Pages
Back to Software Index  BORDER=0Manpage Top Level
    CBRT(3) manual page Table of Contents

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

Multithreading (see pthreads(7) )

The cbrt(), cbrtf(), and cbrtl() functions are thread-safe.

Conforming to

C99, POSIX.1-2001.

See Also

pow(3) , sqrt(3)

Colophon

This page is part of release 3.78 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at http://www.kernel.org/doc/man-pages/.

Table of Contents