Is there an ALT GREAT key on a US Mac keyboard?

I have a Macbook Pro with a US keyboard. I often type in Danish and other languages. In order to make an @ symbol I have to switch to the US keyboard and press Shift + 2.

On a Danish PC keyboard there is an ALT GREAT key which, with 2, gives @.

Is there a similar key on the Mac keyboard?

In other words, how do I make @ using the Danish keyboard input on a US keyboard layout?

it should be the same though I can't be for sure but I do know there are a lot of cool thing you can do with alt on a english keyboard