Shutdown button

Hello,

Yesterday I was at a friend's place and saw his new macbook air. I really liked the button in the right top corner which shuts the computer down in a second. I have a macbook late 2012 (so not the latest model but one before) which does not have this button. Is there a way to setup this button to have the same function? Or a sort of shortkey?

Greets and thanks

KBN

you sure it shutdown and not just put it to sleep?

Yeah it was the button in the top right corner, then you can click enter and your macbook will shut down. I was just wondering whether I could realize something like this on my own macbook which does not have this button.