Dogs have ages that don't quite work like ours. This can be a little ruff when you want to know how old your dog would be if he/she is a human. Don't fret — build a dog-age-converting program to translate your dog's age into human years!
Write a Swift program that solves the quadratic equation.
You just returned from a trip to South America and you came back with three different kinds of currencies. Let's convert them to USD!