[shawn_w]

And then there's Scheme, where there are no iterative loops; all looping is done with recursion. You can build pretty much everything other languages do with loops on top of that, though.

[groovy2shoes]

Not true. Scheme has `do`. See R7RS section 4.2.4 "Iteration".

[shawn_w]

Scheme's `do` is implemented using recursion. There's a sample macro for it in 7.3.