// Int
var someInt: Int = -100
someInt = 100
// UInt(Unsigned Int)
var someUInt: UInt = 200
// someUInt = -200 // 음수 X
// Float
var someFloat: Float = 1.1
someFloat = 1
// Double
var someDouble: Double = 1.1
someDouble = 1
// Bool
var someBool: Bool = true
someBool = false
// Character
var someCharacter: Character = "가"
someCharacter = "A"
someCharacter = "🐢"
// someCharacter = "Hello, Swift!" // String X
// String
var someString: String = "하이하이 🐢"
// 타입 추론
var number = 10