문자 데이터 타입 : Character

var myChar1 : Character
var myChar2 : Character = ":"
var myChar3 : Character = "X"
var myChar3string = "X"
var myChar4 = "\u{0058}"
print(type(of: myChar3)) // Character
print(type(of: myChar3string)) // String
print(myChar4) // X