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

NAME
       copysign, copysignf, copysignl - number manipulation function

SYNOPSIS
       #include <math.h>

       double copysign(double x, double y);
       float copysignf(float x, float y);
       long double copysignl(long double x, long double y);

DESCRIPTION
       These  functions	 shall produce a value with the magnitude of x and the
       sign of y. On implementations that represent a signed zero but  do  not
       treat  negative zero consistently in arithmetic operations, these func‐
       tions regard the sign of zero as positive.

RETURN VALUE
       Upon successful completion, these functions shall return a  value  with
       the magnitude of x and the sign of y.

ERRORS
       No errors are defined.

       The following sections are informative.

EXAMPLES
       None.

APPLICATION USAGE
       None.

RATIONALE
       None.

FUTURE DIRECTIONS
       None.

SEE ALSO
       signbit()  ,  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 Technology
       -- 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			   COPYSIGN(P)
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