This provides an example of function functionality. A function is a block of code that
can be reused as much as needed by calling the name of it. It's useful to make functions
for tasks that you may need to do repeatedly so you can simply call the function rather
than re-writing the same code over and over.
This string is printed out from inside the function
The number 5 is passed to the function. Inside the function,
5 is added to that value and the new value is passed back. The returned
value is 10