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Delphi source code for Math >> Round numbers to a predetermined number of decimals


Category: Math
Title: Round numbers to a predetermined number of decimals
Date added: 15.03.2006
Hits: 16156



function Rounder(var Value: Double; Decimals: Integer): Double;
var
  j: Integer;
  A: Double;
begin
  A := 1;
  case Decimals of
    0: A := 1;
    1: A := 10;
    else
      for j := 1 to Decimals do
        A := A * 10;
  end;
  Result := Int((Value * A) + 0.5) / A;
end;


procedure TForm1.Button1Click(Sender: TObject);
var
  Value: Double;
begin
  Value := 12.6454;
  label1.Caption := FloatToStr(Rounder(Value, 3));
end;

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