How would you round up or down a Float to nearest even numbered integer in Swift 3?

Question

I need a little help rounding up or down a float to the nearest even number in Swift.

Eg:

32.86 would be closest to 32

33.86 would be closest to 34

Answer 1

What about this using Swift 4?

33.86.rounded(.toNearestOrEven)

Answer 2

If you want to round to the nearest even number, divide by 2, round and then multiply by 2:

let rounded = Int(round(value / 2.0)) * 2