Swift 2.2: How can I append to an existing Set?

Question

I want to exploit the properties of a Set but I don't see any way to append to an existing Set.

Here's what I have:

var mySet = Set<Int>()

I would like to do something like:

mySet.append(8)

...which isn't possible.

How can I add to a Set?

Answer 1

I discovered the 'insert' command; which is adequate.