Just a bunch of functions made for random tutorials. (1) Is it prime?; (2) Reverse that string; (3) Gettin' Factorial with it (a story in recursion); (4) Let's Play: Battleship (simple); (5) The next square root (gets the square root of the next perfect square); (6) Dimsum: Summing Digits in a Number; (7) Money Money Money (my solution from the Code Wars kata)