title: Performing Multiple Actions On One Button In Xcode
body: <p>I keep getting the error: </p>
  
  <blockquote>
    <p>Fatal error: Unexpectedly found nil while unwrapping an Optional value</p>
  </blockquote>
  
  <p>when combining two actions. Not exactly sure what to do, since I have been using Xcode only for a few days now. What I would like to do is to perform several calculations/actions when the button is pressed. Thanks beforehand for the input!</p>
  
  <pre><code>import UIKit
  
  class ViewController: UIViewController {
      @IBOutlet weak var priceTextField: UITextField!
      @IBOutlet weak var payoutTextField: UITextField!
      @IBOutlet weak var leasingTextField: UITextField!
      @IBOutlet weak var payoutLabel: UILabel!
      @IBOutlet weak var leasingsumLabel: UILabel!
      @IBOutlet weak var restsumLabel: UILabel!
  
      @IBAction func loanCalculate(_ sender: Any) {
          let price: Double = Double(priceTextField.text!)!
          let twentyPercentOfPrice: Double = price * 0.2
          payoutLabel.text = String(twentyPercentOfPrice)
          let leasingsum: Double = Double(leasingTextField.text!)!
          let thirtyPercentOfLeasing: Double = leasingsum * 0.3
          leasingsumLabel.text = String(thirtyPercentOfLeasing)
      }
  }
  </code></pre>