I want to create a property with CLLocation's longitude and latitude. I tried adding lazy before the variable. There is no error, but the longitude and latitude results are not applied to the attributes. I made a func and tried to use it but it's no use. It just throws an error saying it found nil. What is the problem? I tried to solve it by myself for a long time, but It is too difficult for me who started studying. I need your kind help. CLLocation in Swift please help.

Error Cannot use instance member 'lat' within property initializer; property initializers run before 'self' is available

`import UIKit import MapKit import CoreLocation import Foundation class GetLocation: UIViewController, CLLocationManagerDelegate {     //  var isLocationEnabled = false       var locationManager: CLLocationManager!       var lat: Double = 1   var lon: Double = 1       var region = CLLocation(latitude: lat, longitude: lon)      //  let geoCoder = CLGeocoder()       override func viewDidLoad() {     super.viewDidLoad()           self.locationManager = CLLocationManager()     self.locationManager?.delegate = self        }       func regionManager() {     self.locationManager.desiredAccuracy = kCLLocationAccuracyBest     self.locationManager.requestAlwaysAuthorization()           if CLLocationManager.locationServicesEnabled() {       print("Location Enabled")     } else {       print("Location Not Enabled")     }   }      func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {           let location = locations[0] as CLLocation           let latitube = location.coordinate.latitude     let longitube = location.coordinate.longitude           lat = latitube     lon = longitube   } }