Recursive rights and wrongs

I don't know if Jack Altiere is right when he says many programmers are afraid of recursion, but if it's true I expect they fall into two categories:

1. Those who have not learned what recursion is yet.
2. Those who have learned that it is often better not to use it.

Jack's short introduction is probably good for those in category one, but if you want to ever consider yourself an experienced programmer you should be trying to get into category two. This article is intended to help you get to category two as quickly as possible.