can you get a new macbook while the other one is being repaired?

Hello

i'm a student and i'm looking for a new macbook,But if my macbook needs to be repaired i don't have an other one to work with.

But i need a macbook for my school every day and i cant be without one for a week.

So my question is: while your macbook is being repaired can you get a new one to work with in the time they are working on the other on

yours sincerely , Matthijs