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Exercise 8.1: Displaying a message
Rewrite the function declaration that displays a short message as an anonymous function. Verify that the anonymous function is not hoisted by calling the function before creating it.
Exercise 8.2: Joining two strings
Rewrite the function declaration that joins the two strings as an anonymous function.
Exercise 8.3: Pass an argument when calling a function
Rewrite the function declaration that passes a number as an anonymous function.
Exercise 8.4: Return a value from a called function
Rewrite the function declaration that calls a random number generator function as an anonymous function.
Exercise 8.5: Create an immediately invoked function
Copy the function in exercise 8-1, rename it, and rewrite it as an immediately invoked anonymous function.