We have covered a great deal in this chapter, and I really encourage you to play around creating functions and passing values around.

If you don't want to continually create new projects every time you create a new application, you can create and test your code on the Rust Playground website (https://play.rust-lang.org). Here you can enter your code, hit Run, and see instantly if what you have written works.

In the next chapter, we will be covering getting information in and out, and validating your entries.