fabs man page on NeXTSTEP

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FLOOR(3M)							     FLOOR(3M)

NAME
       fabs, floor, ceil- absolute value, floor, and ceiling functions

SYNOPSIS
       #include <math.h>

       double floor(double x);

       double ceil(double x);

       double fabs(double x);

(ALSO AVAILABLE IN BSD)
       double rint(double x);

DESCRIPTION
       Fabs returns the absolute value |x|.

       Floor returns the largest integer no greater than x.

       Ceil returns the smallest integer no less than x.

       Rint  returns  the  integer  (represented as a double precision number)
       nearest x in the direction of the prevailing rounding mode.

NOTES
       In the default rounding mode, to nearest, on a machine that conforms to
       IEEE  754,  rint(x)  is	the  integer  nearest  x  with	the additional
       stipulation that	 if  |rint(x)-x|=1/2  then  rint(x)  is	 even.	 Other
       rounding	 modes	can  make  rint act like floor, or like ceil, or round
       towards zero.

       Another way to obtain an integer near x is to declare (in C):
	      double x;	    int k;    k = x;
       Most C compilers round x towards 0 to get the integer k,	 but  some  do
       otherwise.   If in doubt, use floor, ceil, or rint first, whichever you
       intend.	Also note that, if x is larger than  k	can  accommodate,  the
       value  of k and the presence or absence of an integer overflow are hard
       to predict.

SEE ALSO
       abs(3), ieee(3M), math(3M)

4th Berkeley Distribution	August 1, 1992			     FLOOR(3M)
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