计算从1加到10000

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unit Unit1;

interface

uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls;

type
TForm1 = class(TForm)
Label1: TLabel;
Button1: TButton;
procedure Button1Click(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;

var
Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.Button1Click(Sender: TObject);
var
i,j : Integer;
begin
i := 1;
j := 0;
while i <= 10000 do
begin
j := j+i;
Inc(i,1);
end;
Label1.Caption := IntToStr(j);
end;

end.