fabs(3m) [bsd man page]

FLOOR(3M)																 FLOOR(3M)

NAME

       fabs, floor, ceil, rint - absolute value, floor, ceiling, and round-to-nearest functions

SYNOPSIS

       #include <math.h>

       double floor(x)
       double x;

       double ceil(x)
       double x;

       double fabs(x)
       double x;

       double rint(x)
       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

       On a VAX, rint(x) is equivalent to adding half to the magnitude and then rounding towards zero.

       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					   May 12, 1986 							 FLOOR(3M)

FLOOR(3M)																 FLOOR(3M)

NAME

       fabs, floor, ceil, rint - absolute value, floor, ceiling, and round-to-nearest functions

SYNOPSIS

       #include <math.h>

       double floor(x)
       double x;

       double ceil(x)
       double x;

       double fabs(x)
       double x;

       double rint(x)
       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

       On a VAX, rint(x) is equivalent to adding half to the magnitude and then rounding towards zero.

       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					   May 12, 1986 							 FLOOR(3M)