Tugas 4 (Form 1 Borland Delphi 7)

unit Unit1;
interface
uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls, ExtCtrls, jpeg;
type
  TForm1 = class(TForm)
    Button1: TButton;
    Label1: TLabel;
    Label2: TLabel;
    Button2: TButton;
    Label3: TLabel;
    Button3: TButton;
    Label4: TLabel;
    Button4: TButton;
    Button5: TButton;
    Label5: TLabel;
    Label6: TLabel;
    Label7: TLabel;
    Button6: TButton;
    Edit1: TEdit;
    Edit2: TEdit;
    Edit3: TEdit;
    Label8: TLabel;
    Image1: TImage;
    procedure Button5Click(Sender: TObject);
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
    procedure Button3Click(Sender: TObject);
    procedure Button4Click(Sender: TObject);
    procedure Button6Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;
var
  Form1: TForm1;
implementation
{$R *.dfm}
procedure TForm1.Button5Click(Sender: TObject);
begin
close;
end;
procedure TForm1.Button1Click(Sender: TObject);
var
i,j:integer; b:string;
begin
b:='';j:=2;
for i:=1 to 10 do
begin
b:=b+inttostr(j)+' ';
j:=j+2;
end;
label1.Caption:=b;
end;
procedure TForm1.Button2Click(Sender: TObject);
var
i,j:integer; b:string;
begin
b:='';j:=2;
for i:=10 downto 1 do
begin
b:=b+inttostr(i)+' ';
j:=j+2;
end;
label2.Caption:=b;
end;
procedure TForm1.Button3Click(Sender: TObject);
var
i,j:integer; b:string;
begin
i:=1;
b:='';
while i<=10 do
begin
b:=b+inttostr(i)+' ';
i:=i+1;
end;
label3.Caption:=b;
end;
procedure TForm1.Button4Click(Sender: TObject);
var
i,j:integer; b:string;
begin
i:=1;
b:='';
repeat
b:=b+inttostr(i)+'';
i:=i+1;
until i>10;
label4.Caption:=b;
end;
procedure TForm1.Button6Click(Sender: TObject);
var
bil,hasil,pangkat,a:integer;
begin
bil:=strtoint(edit1.Text);
hasil:=bil;
pangkat:=strtoint(edit2.Text);
if edit2.Text='0' then edit3.Text:='1' else
if edit2.Text='1' then edit3.Text:=edit1.Text else
begin
for a:=2 to pangkat do
hasil:=hasil*bil;
edit3.Text:=inttostr(hasil);
end;
end;
end.

PrtScr :