To go up to either floor is it by stairs or elevator?

Elevators

There are elevators to get everywhere you need. You are initially brought up to the 80th floor to a museum like area. To get to the 86th floor you have the option to take the stairs for evelator.

You would use one of the several elevators unless you absolutely wanted to use the stairs. There are viewing decks on the 86th floor and 102nd

By elevators only, you can go to 84th floor and 106th floor, both floors have different tickets and rates

You probably could take the stairs, but everyone takes the elevator

U only go to the last floor. By elevator.

Elevator