NAME digits - return number of "decimal" digits in an integral part SYNOPSIS digits(x [,b]) TYPES x real b integer >= 2, defaults to 10 return integer DESCRIPTION Returns number of digits in the standard base-b representation when x is truncated to an integer and the sign is ignored. To be more precise: when abs(int(x)) > 0, this function returns the value 1 + ilog(x, b). When abs(int(x)) == 0, then this function returns the value 1. If omitted, b is assumed to be 10. If given, b must be an integer > 1. One should remember these special cases: digits(12.3456) == 2 computes with the integer part only digits(-1234) == 4 computes with the absolute value only digits(0) == 1 specical case digits(-0.123) == 1 combination of all of the above EXAMPLE ; print digits(100), digits(23209), digits(2^72) 3 5 22 ; print digits(0), digits(1), digits(-1) 1 1 1 ; print digits(-1234), digits(12.3456), digits(107.207) 4 2 3 ; print digits(17^463-1, 17), digits(10000, 100), digits(21701, 2) 3, 15 14 LIMITS b > 1 LINK LIBRARY long qdigits(NUMBER *q, ZVALUE base) SEE ALSO digit, places ## Copyright (C) 1999-2003 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: 29.6 $ ## @(#) $Id: digits,v 29.6 2006/05/07 07:25:46 chongo Exp $ ## @(#) $Source: /usr/local/src/cmd/calc/help/RCS/digits,v $ ## ## Under source code control: 1995/10/03 10:40:01 ## File existed as early as: 1995 ## ## chongo /\oo/\ http://www.isthe.com/chongo/ ## Share and enjoy! :-) http://www.isthe.com/chongo/tech/comp/calc/
