SK
Human {
var name = "Steven"
var age: Int? = 30
var hairs =
true
var hairColor = "Black"
func description() -> String {
if
let humanAge = age {
return "Hello! My name id \(name) and !`am \(humanAge) years old!"
}
else {
return "Hello! My name id \(name)"
}
// guard let manAge = age else {
// return "Hello! My name id \(name) and !`am \(manAge) years old!"
// }
}
}