Technically the third has no variables... Slightly less wise-ass, I couldn't come up with a use case for this code that'd give sane variable names. Third attem

Technically the third has no variables... Slightly less wise-ass, I couldn't come up with a use case for this code that'd give sane variable names. Third attempt: sum $ do (element, True) <- results guard (odd element) return element That's pretty far from imperative languages, though, which I kind of tried to avoid.