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

NAME
       fabs, fabsf, fabsl - absolute value function

SYNOPSIS
       #include <math.h>

       double fabs(double x);
       float fabsf(float x);
       long double fabsl(long double x);

DESCRIPTION
       These  functions shall compute the absolute value of their argument x,|
       x|.

RETURN VALUE
       Upon successful completion, these functions shall return	 the  absolute
       value of x.

       If x is NaN, a NaN shall be returned.

       If x is ±0, +0 shall be returned.

       If x is ±Inf, +Inf shall be returned.

ERRORS
       No errors are defined.

       The following sections are informative.

EXAMPLES
       None.

APPLICATION USAGE
       None.

RATIONALE
       None.

FUTURE DIRECTIONS
       None.

SEE ALSO
       isnan() , 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			       FABS(P)
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