let first = "A"
let second = "B"
let third = String("A")

var areEqual = first == second
//areEqual is false
print("areEqual is \(areEqual)")

let areNotEqual = first != second
//areNotEqual is true
print("areNotEqual is \(areNotEqual)")

areEqual = first == third
//areEqual is true
print("areEqual is \(areEqual)")