MiniCursoIFSPSwiftOptionals

MiniCursoIFSPSwiftOptionals.swift

var optionalString: String? = nil

if let unwrappedOptionalWithIf = optionalString {
    print("Use \(unwrappedOptionalWithIf) here")
}

func printString(string: String?) {
    guard let unwrappedOptionalWithGuard = optionalString else {
        print("Treat error")
        return
    }
    
    print("Use \(unwrappedOptionalWithGuard) here")
}