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32.\" from: @(#)ceil.3 5.1 (Berkeley) 5/2/91
33.\" $FreeBSD: head/lib/msun/man/ceil.3 140172 2005-01-13 09:11:41Z stefanf $
34.\"
35.Dd January 13, 2005
36.Dt CEIL 3
37.Os
38.Sh NAME
39.Nm ceil ,
40.Nm ceilf ,
41.Nm ceill
42.Nd smallest integral value greater than or equal to x
43.Sh LIBRARY
44.Lb libm
45.Sh SYNOPSIS
46.In math.h
47.Ft double
48.Fn ceil "double x"
49.Ft float
50.Fn ceilf "float x"
51.Ft long double
52.Fn ceill "long double x"
53.Sh DESCRIPTION
54The
55.Fn ceil ,
56the
57.Fn ceilf
58and the
59.Fn ceill
60functions return the smallest integral value
61greater than or equal to
62.Fa x ,
63expressed as a floating-point number.
64.Sh SEE ALSO
65.Xr abs 3 ,
66.Xr fabs 3 ,
67.Xr floor 3 ,
68.Xr ieee 3 ,
69.Xr math 3 ,
70.Xr rint 3 ,
71.Xr round 3 ,
72.Xr trunc 3
73.Sh STANDARDS
74The
75.Fn ceil
76function conforms to
77.St -isoC .
78The
79.Fn ceilf
80and the
81.Fn ceill
82functions conform to
83.St -isoC-99 .