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We are new programmers and are trying to parse an Exchange Rate API. We are able to pull data from the API, but are unable to extract and use that data.Line 54 shows the API is working, and will show the correct data in the debug area.Line 58 is, we believe, the problem area.Any suggestions are appreciated.Kind Regards,import UIKit struct ExchangeRates: Decodable { var base: String = "" var rates: [String: Double] } class ViewController: UIViewController { override func viewDidLoad() { super.viewDidLoad() // Do any additional setup after loading the view. getExRate(currencyBase: "USD") //this whole for-in loop did not work for (key, value) in updatedExRates { // var exchangeRateValue: Double if (key == "HUF"){ // exchangeRateValue = value print(value) displayLabel.text! = "\(key): \(value)" } } } @IBOutlet weak var displayLabel: UILabel! var updatedExRates = [String: Double]() func getExRate(currencyBase: String) { // ((completion: @escaping(Result<exchangerates, currencyerror="">) -> Void)) let resourceString = "https://api.exchangeratesapi.io/latest?base=\(currencyBase)" let resourceURL = URL(string: resourceString) print(resourceURL!) guard resourceURL != nil else{ return } let session = URLSession.shared let dataTask = session.dataTask(with: resourceURL!) { (data, response, error) in //check for error if error == nil && data != nil { //parse JSON let decoder = JSONDecoder() do{ let exRates = try decoder.decode(ExchangeRates.self, from: data!) print(exRates) //this works(see debug area) // this is where the issue started to occur. //It does not assign the dictionary to this variable I have created(returns nil instead). self.updatedExRates = exRates.rates } catch { print("error in JSON parsing") } } } //Make the API call dataTask.resume() } }