func optionalTest() {
    let myName: String? = nil
    guard let name = myName
    else {
        print("I don't have a name")
        return //You need to return or throw an error, otherwise the compiler complains:
               //"error: 'guard' body may not fall through, consider using a 'return' or 'throw' to exit the scope
    }

    print("My name is \(name)")

}
optionalTest()
/*
I don't have a name
*/