relibc_openlibm/man/ceil.3

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.\"     from: @(#)ceil.3	5.1 (Berkeley) 5/2/91
.\" $FreeBSD: src/lib/msun/man/ceil.3,v 1.16 2007/01/09 01:02:05 imp Exp $
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.Dd January 13, 2005
.Dt CEIL 3
.Os
.Sh NAME
.Nm ceil ,
.Nm ceilf ,
.Nm ceill
.Nd smallest integral value greater than or equal to x
.Sh LIBRARY
.Lb libm
.Sh SYNOPSIS
.In math.h
.Ft double
.Fn ceil "double x"
.Ft float
.Fn ceilf "float x"
.Ft "long double"
.Fn ceill "long double x"
.Sh DESCRIPTION
The
.Fn ceil ,
.Fn ceilf
and
.Fn ceill
functions return the smallest integral value
greater than or equal to
.Fa x ,
expressed as a floating-point number.
.Sh SEE ALSO
.Xr abs 3 ,
.Xr fabs 3 ,
.Xr floor 3 ,
.Xr ieee 3 ,
.Xr math 3 ,
.Xr rint 3 ,
.Xr round 3 ,
.Xr trunc 3
.Sh STANDARDS
The
.Fn ceil
function conforms to
.St -isoC .
The
.Fn ceilf
and
.Fn ceill
functions conform to
.St -isoC-99 .