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/*:
 
 ### Knowledge check #6
 
 What will happen when the code below is run?
 
 Make a prediction before you actually type and run the code.
 
 ![kc6](kc-six.png)
 
 */
// Type the code below this line...


/*:
 
 ## Summarize your learning
 
 In your app development journal, write brief responses to the following questions:
 
 1. If you force-unwrap an optional variable that contains a *nil* value, what happens?
 2. What are the benefits of using *optional binding*?
 3. Why do the concepts of optional variables and safely unwrapping these variables exist in Swift?
 
 */
