Whats wrong with my code?

I think it's giving you an error, because in the class, it is suppose to fill the location constant with the location parameter in the init method, and then when you are going to create the someBusiness object, you need to pass a Location object like an argument. Try this:

struct Location {
    let latitude: Double
    let longitude: Double
}

class Business {
    let name: String
    let location: Location

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

let locationExample = Location(latitude: 12.1, longitude: 12.2)

let someBusiness = Business(name: "REI", location: locationExample)

Ramiro is right. Your solution was very close. When you're creating an instance of the Business class, you're already passing in a name (a String) and a location (a Location instance), so the Location instance itself does not have to be created in the init method of Business.

The fix would be to change: self.location = Location(latitude: Double, longitude: Double) to self.location = location

To clarify, the term "location" in the fixed code will be assigned to whatever Location instance you pass in when you're creating someBusiness (which in your case would be Location(latitude: 12.1, longitude: 12.2) ). Does that make sense?

Thanks, guys, I was stuck with the exact same problem, and tried several variations on that last Location piece. Assigning it to a constant worked for me.