its not clear to work

Hey mohammad ibrahim,

You're almost there! You've set up your initializer method properly, now you just need to define the implementation of it. You do this by assigning the values you pass in to the stored properties of your Business class. Since the initializer parameter names have the same name as the stored properties, we have to use self to disambiguate and let the compiler know which we are referring to.

Once you've done this, you just need to create an instance using this initializer you've just created, and assign the result to a constant named someBusiness. You do this by passing in a String for name and a Location instance for location, as you've define in your initializer. You can create the location instance right inside of the call to your Business class' initializer, as you can see in my code below.

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 someBusiness = Business(name: "Treehouse", location: Location(latitude: 10, longitude: 10))

Good Luck!