Question: I have been approved as an immigrant to Canada. I am wondering, however, if it’s possible to leave Canada right after I enter the country.
Answer: There is a great possibility that you will not yet have your permanent resident card upon your entry in Canada.
And without that card, you will not be allowed on the plane.
So yes, you can leave Canada right after your entry, but only if you have your Permanent Resident (PR) card.