Functions often define a process that receives inputs and use it to compute an output.
Functions will usually use their arguments to compute a value which will become the result from the function call.
The important part of this exercise is to learn about
return keyword is used inside a function to return a value when a function is called.
As an example, in math, the
identity function is a function that always returns the same value that was used as its argument. Remember the argument is just a specific value of the parameters.