>You may use recursion, if you're calculating a determinant. I created a recursion-based program in VB...
>
>BTW, it's a well-known fact, that each recursive program could be done in non-recursive way too.

Maybe it's worth to add that the recursive solution is always (or almost always) slower than the non-recursive solution,
while the recursive one is usually more clear and readable... but it's not the case witht the factorials! :)

Vlad