unit Unit2;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, Borland.Vcl.StdCtrls, System.ComponentModel;

type
  TForm2 = class(TForm)
    Edit1: TEdit;
    Edit2: TEdit;
    Memo1: TMemo;
    Button1: TButton;
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form2: TForm2;

implementation

{$R *.nfm}

procedure TForm2.Button1Click(Sender: TObject);
Var
i:integer;
begin
  For i:=StrToInt(Edit1.Text) to StrToInt(Edit2.Text) Do 
Begin
Memo1.Lines.Add(IntToStr(i));
Application.ProcessMessages;
End;
end;

end.