Swift 3 Range overview:

RangeOverview.swift

import Foundation

/*Range*/
let a:Range<Int> = 1..<3
print(type(of:a))//Range<Int>
a.upperBound//3

/*ClosedRange*/
let b:ClosedRange<Int> = 1...3
print(type(of:b))//ClosedRange<Int>
b.upperBound//3

/*CountableRange*/
let c:CountableRange = 1..<3
print(type(of:c))//CountableRange<Int>
c.startIndex//1
c.endIndex//3
c.upperBound//3
c.last//2

/*CountableClosedRange*/
let d/*:CountableClosedRange*/ = 1...3
print(type(of:d))//CountableClosedRange<Int>
print(d.startIndex)//1
print(d.last!)//3
print(d.endIndex)//past end
d.upperBound//3