Object Oriented Swift, Classes with Custom Types, solved, but why did it work?

I completed this challenge by hardcoding the values for location within the Business class, but when I was just trying to set the type without hardcoding, I was getting this error: error: cannot convert value of type 'Double.Type' to expected argument type 'Double' self.location = Location(latitude: Double, longitude: Double)

Why did this work: ` [...]

class Business { [...]

init(name: String, location: Location) {
    self.name = name
    self.location = Location(latitude: 1.00, longitude: 1.00)
}

} `

But not this:

` [...]

class Business { [...]

init(name: String, location: Location) {
    self.name = name
    self.location = Location(latitude: Double, longitude: Double)
}

} ` Shouldn't a good development technique be to be abstract as much as possible? Also, if I try to initialize an instance of Business, it winds up having the characteristics in the initializer, NOT the ones I'm trying to impose upon creation (i.e. lat and long will be 1.00, not any other Double I enter in).

Thank you!