let string: String = "A"
let numberThree: UInt = -123
let numberOne: Int = 123
let character: Character = 'A'
let numberTwo: Double = 123
정답 : 2, 4
정답 : 3
var arrayOne: Array<Int> = [1, 2, 3]
var dictionaryOne: Dictionary<String> = Dictionary<String>()
var dictionary: [String:Int] = ["key":100]
var arrayThree: [Int] = [Int]
var arrayTwo: [Int] = Array<Int>()
정답 : 2, 4