📄 btrunc
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NAME btrunc - truncate a value to a number of binary placesSYNOPSIS btrunc(x [,plcs])TYPES x real plcs integer, defaults to zero return realDESCRIPTION Truncate x to plcs binary places, rounding if necessary towards zero, i.e. btrunc(x, plcs) is a multiple of 2^-plcs and the remainder x - btrunc(x, plcs) is either zero or has the same sign as x and absolute value less than 2^-plcs. Here plcs may be positive, zero or negative. Except that it is defined only for real x, btrunc(x, plcs) is equivalent to bround(x, plcs, 2). btrunc(x,0) and btrunc(x) are equivalent to int(x).EXAMPLE ; print btrunc(pi()), btrunc(pi(), 10) 3 3.140625 ; print btrunc(3.3), btrunc(3.7), btrunc(3.3, 2), btrunc(3.7, 2) 3 3 3.25 3.5 ; print btrunc(-3.3), btrunc(-3.7), btrunc(-3.3, 2), btrunc(-3.7, 2) -3 -3 -3.25 -3.5 ; print btrunc(55.123, -4), btrunc(-55.123, -4) 48 -48LIMITS abs(j) < 2^31LINK LIBRARY NUMBER *qbtrunc(NUMBER *x, *j)SEE ALSO bround, int, round, trunc## Copyright (C) 1999 Landon Curt Noll#### Calc is open software; you can redistribute it and/or modify it under## the terms of the version 2.1 of the GNU Lesser General Public License## as published by the Free Software Foundation.#### Calc is distributed in the hope that it will be useful, but WITHOUT## ANY WARRANTY; without even the implied warranty of MERCHANTABILITY## or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General## Public License for more details.#### A copy of version 2.1 of the GNU Lesser General Public License is## distributed with calc under the filename COPYING-LGPL. You should have## received a copy with calc; if not, write to Free Software Foundation, Inc.## 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.#### @(#) $Revision: 29.3 $## @(#) $Id: btrunc,v 29.3 2006/05/07 07:25:46 chongo Exp $## @(#) $Source: /usr/local/src/cmd/calc/help/RCS/btrunc,v $#### Under source code control: 1994/09/30 00:44:27## File existed as early as: 1994#### chongo <was here> /\oo/\ http://www.isthe.com/chongo/## Share and enjoy! :-) http://www.isthe.com/chongo/tech/comp/calc/
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