Round double value Down - CSharp System

CSharp examples for System:Double

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Description

Round double value Down

Demo Code

/* HeuristicLab//from   w w w.j a v  a  2  s.  com
 * Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
 *
 * This file is part of HeuristicLab.
 *
 * HeuristicLab is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * HeuristicLab 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
 */
using System;

public class Main{
    private static double RoundDown(this double value, int decimalRank) {
      if (decimalRank > 0) {
        var floor = (int)Math.Floor(value);
        var pow = (int)Math.Pow(10, decimalRank);
        var mod = Mod(floor, pow);
        return floor - mod;
      }
      return value.Floor(Math.Abs(decimalRank));
    }
        // rounds down to the nearest value according to the given number of decimal precision
    private static double Floor(this double value, int precision) {
      var n = Math.Pow(10, precision);
      return Math.Round(Math.Floor(value * n) / n, precision);
    }
}

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