round.3 (f789cb829380f2501402d11904f10adf363f7da5) round.3 (d0f136337018033643078ec257de0ad091bcaec8)
1.\" Copyright (c) 2003, Steven G. Kargl
2.\" All rights reserved.
3.\"
4.\" Redistribution and use in source and binary forms, with or without
5.\" modification, are permitted provided that the following conditions
6.\" are met:
7.\" 1. Redistributions of source code must retain the above copyright
8.\" notice, this list of conditions and the following disclaimer.

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19.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
20.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
21.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
22.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
23.\" SUCH DAMAGE.
24.\"
25.\" $FreeBSD$
26.\"
1.\" Copyright (c) 2003, Steven G. Kargl
2.\" All rights reserved.
3.\"
4.\" Redistribution and use in source and binary forms, with or without
5.\" modification, are permitted provided that the following conditions
6.\" are met:
7.\" 1. Redistributions of source code must retain the above copyright
8.\" notice, this list of conditions and the following disclaimer.

--- 10 unchanged lines hidden (view full) ---

19.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
20.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
21.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
22.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
23.\" SUCH DAMAGE.
24.\"
25.\" $FreeBSD$
26.\"
27.Dd April 7, 2005
27.Dd November 29, 2003
28.Dt ROUND 3
29.Os
30.Sh NAME
31.Nm round ,
28.Dt ROUND 3
29.Os
30.Sh NAME
31.Nm round ,
32.Nm roundf ,
33.Nm roundl
32.Nm roundf
34.Nd round to nearest integral value
35.Sh LIBRARY
36.Lb libm
37.Sh SYNOPSIS
38.In math.h
39.Ft double
40.Fn round "double x"
41.Ft float
42.Fn roundf "float x"
33.Nd round to nearest integral value
34.Sh LIBRARY
35.Lb libm
36.Sh SYNOPSIS
37.In math.h
38.Ft double
39.Fn round "double x"
40.Ft float
41.Fn roundf "float x"
43.Ft "long double"
44.Fn roundl "long double x"
45.Sh DESCRIPTION
46The
42.Sh DESCRIPTION
43The
47.Fn round ,
48.Fn roundf ,
44.Fn round
49and
45and
50.Fn roundl
46.Fn roundf
51functions return the nearest integral value to
52.Fa x ;
47functions return the nearest integral value to
48.Fa x ;
53if
49if
54.Fa x
55lies halfway between two integral values, then these
56functions return the integral value with the larger
57absolute value (i.e., they round away from zero).
58.Sh SEE ALSO
59.Xr ceil 3 ,
60.Xr floor 3 ,
61.Xr ieee 3 ,
50.Fa x
51lies halfway between two integral values, then these
52functions return the integral value with the larger
53absolute value (i.e., they round away from zero).
54.Sh SEE ALSO
55.Xr ceil 3 ,
56.Xr floor 3 ,
57.Xr ieee 3 ,
62.Xr lrint 3 ,
63.Xr lround 3 ,
64.Xr math 3 ,
58.Xr math 3 ,
65.Xr rint 3 ,
66.Xr trunc 3
59.Xr rint 3
67.Sh STANDARDS
60.Sh STANDARDS
68These functions conform to
61The
62.Fn round
63function conforms to
69.St -isoC-99 .
70.Sh HISTORY
71The
72.Fn round
73and
74.Fn roundf
75functions appeared in
76.Fx 5.3 .
64.St -isoC-99 .
65.Sh HISTORY
66The
67.Fn round
68and
69.Fn roundf
70functions appeared in
71.Fx 5.3 .
77The
78.Fn roundl
79function appeared in
80.Fx 6.0 .