posix man page for cbrtf

CBRT(P) 						     POSIX Programmer's Manual							   CBRT(P)

NAME
       cbrt, cbrtf, cbrtl - cube root functions

SYNOPSIS
       #include <math.h>

       double cbrt(double x);
       float cbrtf(float x);
       long double cbrtl(long double x);

DESCRIPTION
       These functions shall compute the real cube root of their argument x.

RETURN VALUE
       Upon successful completion, these functions shall return the cube root of x.

       If x is NaN, a NaN shall be returned.

       If x is +-0 or +-Inf, x shall be returned.

ERRORS
       No errors are defined.

       The following sections are informative.

EXAMPLES
       None.

APPLICATION USAGE
       None.

RATIONALE
       For  some  applications, a true cube root function, which returns negative results for negative arguments, is more appropriate than pow( x,
       1.0/3.0), which returns a NaN for x less than 0.

FUTURE DIRECTIONS
       None.

SEE ALSO
       The Base Definitions volume of IEEE Std 1003.1-2001, <math.h>

COPYRIGHT
       Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Standard for Information Technol-
       ogy -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
       Electrical and Electronics Engineers, Inc and The Open Group. In the event of any discrepancy between this version and  the  original  IEEE
       and  The  Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The original Standard can be obtained
       online at http://www.opengroup.org/unix/online.html .

IEEE
/The Open Group						       2003								   CBRT(P)