what's the easiest way to add the value of two text fields to equal a sum to a label

Question

what\'s the easiest way to add the value of two textField to equal a sum to a label.
Here are the text fields and label I am using:

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Answer 1

If you have numbers on there use this:

if let num1 = Double(f1TextField.text!), let num2 = Double(f2TextField.text!) {
    speedLabel.text = "\(num1 + num2)"
}