A fun and quick C# console application I made that takes a number given by the user and implements the Collatz Conjecture. It prints out the calculations and also calculates and prints a few other statistics to see how they vary as numbers get larger/smaller. Uses 32-bit integers, so large numbers will break it. Can easily be modified to handle 64-bit.
Inspiration: https://imgs.xkcd.com/comics/collatz_conjecture.png