NAME

cbrt(), cbrtf() − cube root functions

SYNOPSIS

#include <math.h>

double cbrt(double x);

float cbrtf(float x);

DESCRIPTION

cbrt() returns the cube root of x.

cbrtf() is a float version of cbrt(); it takes a float argument and returns a float result.  To use this function, compile either with the −Ae option or with the −Aa and −D_HPUX_SOURCE options.  Otherwise, the compiler promotes the float argument to double, and the function returns incorrect results. 

cbrtf() is not specified by any standard, but it is named in accordance with the conventions specified in the "Future Library Directions" section of the ANSI C standard. 

To use these functions, link in the math library by specifying −lm on the compiler or linker command line. 

RETURN VALUE

If x is ±INFINITY, cbrt() returns ±INFINITY. 

If x is NaN, cbrt() returns NaN. 

ERRORS

No errors are defined. 

SEE ALSO

exp(3M), log(3M), pow(3M), sqrt(3M), isinf(3M), isnan(3M). 

STANDARDS CONFORMANCE

cbrt(): SVID3, XPG4.2

Hewlett-Packard Company  —  HP-UX Release 10.20:  July 1996