2004-06-07 10:05:36 +02:00
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.\" Copyright (c) 2003, Steven G. Kargl
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.\"
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2005-04-08 03:24:08 +02:00
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.Dd April 7, 2005
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2004-06-07 10:05:36 +02:00
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.Dt ROUND 3
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.Os
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.Sh NAME
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.Nm round ,
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2005-04-08 03:24:08 +02:00
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.Nm roundf ,
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.Nm roundl
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2004-06-07 10:05:36 +02:00
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.Nd round to nearest integral value
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.Sh LIBRARY
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.Lb libm
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.Sh SYNOPSIS
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.In math.h
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.Ft double
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.Fn round "double x"
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.Ft float
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.Fn roundf "float x"
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2005-06-15 21:04:04 +02:00
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.Ft "long double"
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.Fn roundl "long double x"
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.Sh DESCRIPTION
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The
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.Fn round ,
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.Fn roundf ,
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2004-06-07 10:05:36 +02:00
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and
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.Fn roundl
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2004-06-07 10:05:36 +02:00
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functions return the nearest integral value to
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.Fa x ;
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2005-01-11 21:50:51 +01:00
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if
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.Fa x
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lies halfway between two integral values, then these
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functions return the integral value with the larger
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absolute value (i.e., they round away from zero).
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.Sh SEE ALSO
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.Xr ceil 3 ,
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.Xr floor 3 ,
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.Xr ieee 3 ,
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2005-01-12 00:12:17 +01:00
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.Xr lrint 3 ,
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.Xr lround 3 ,
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2004-06-07 10:05:36 +02:00
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.Xr math 3 ,
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2004-06-20 11:27:17 +02:00
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.Xr rint 3 ,
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.Xr trunc 3
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.Sh STANDARDS
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2005-04-08 03:24:08 +02:00
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These functions conform to
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2004-06-07 10:05:36 +02:00
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.St -isoC-99 .
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.Sh HISTORY
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The
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.Fn round
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and
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.Fn roundf
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functions appeared in
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.Fx 5.3 .
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2005-04-08 03:24:08 +02:00
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The
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.Fn roundl
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function appeared in
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.Fx 6.0 .
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