FreeBSD-5.3/lib/msun/man/trunc.3

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.\" Copyright (c) 2004 David Schultz <das@FreeBSD.org>
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.\" $FreeBSD: src/lib/msun/man/trunc.3,v 1.1 2004/06/20 09:25:43 das Exp $
.\"
.Dd June 20, 2004
.Dt TRUNC 3
.Os
.Sh NAME
.Nm trunc ,
.Nm truncf
.Nd nearest integral value with magnitude less than or equal to |x|
.Sh LIBRARY
.Lb libm
.Sh SYNOPSIS
.In math.h
.Ft double
.Fn trunc "double x"
.Ft float
.Fn truncf "float x"
.Sh DESCRIPTION
The
.Fn trunc
and
.Fn truncf
functions return the nearest integral value with magnitude less than
or equal to
.Pf | Fa x Ns | .
They are equivalent to
.Fn rint
and
.Fn rintf ,
respectively, in the
.Dv FE_TOWARDZERO
rounding mode.
.Sh SEE ALSO
.Xr ceil 3 ,
.Xr fesetround 3 ,
.Xr floor 3 ,
.Xr math 3 ,
.Xr nextafter 3 ,
.Xr rint 3 ,
.Xr round 3
.Sh STANDARDS
The
.Fn trunc
and
.Fn truncf
functions conform to
.St -isoC-99 .
.Sh HISTORY
These routines first appeared in
.Fx 5.3 .