Exercises

Now that you understand an instance's life cycle, it is time to spend some time in the Playground creating new classes and instances:

• Exercise 1: Create a new Employee class with a custom initializer that requires two string arguments: firstName and lastName. Use the arguments to initialize properties with the same names as the arguments. Display a message with the values for firstName and lastName when an instance of the class is created. Display a message with the values for firstName and lastName when an instance of the class is destroyed.

  Create an instance of the Employee class and assign it to a variable. Check the messages printed in the Playground's Debug area. Assign a new instance of the Employee class to the previously defined variable. Check the messages printed in the Playground's Debug area.

• Exercise 2: Create a function that receives two string arguments: firstName and lastName. Create an instance of the previously defined Employee class with the received arguments as parameters for the creation of the instance. Use the instance properties to print a message with the first name followed by a space and the last name. You will be able to create a method and add it to the Employee class later to perform the same task. However, first, you must understand how you can work with the properties defined in a class.