Tcl/Tk : Another hello world

Hello world using tcl/tk presented below may be more clear than oneliner before.

1. create a label named .label1 with hello world text
2. create a button named .button1 with OK text and will do exit when clicked.
3. pack .label1 to make it showed on screen.
4. pack .button1 to make it showed on screen below .label1.

Here is the result.

Done.