> faculty  n
>     | n == 0			=  1
>     | otherwise		=  n * faculty n'
>     where n'			=  n - 1
>           unused		=  n'
> weird a b
>     where (c, d) | cond	=  (a, b)
>                  | otherwise	=  (b, a)
> list				=  [ i * i
>				   | i <- [0 .. 99 ] ]
> main				=  sequence [ print i
>				            | i <- [0 .. 99] ]