You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more
This is my own code. Both + and * are defined for type-level Ints in the standard library, with fast implementations that just operate on the integers as numbers, but my implementations show that it's completely possible to build these using just the successor type (S[n]).
Note that S[n] actually provides both increment and decrement, depending on whether we apply it or pattern match against it (i.e. type unification).
