[Haskell-cafe] Monads as control structures?

Hi, so I'm a newbie getting used to Haskell. I'm writing some simple things like genetic algorithms in it for practice, and I keep coming across something that really bugs me: are there any standard libraries that allow you to do imperative style for or while loops using monads to keep track of state? I know there's things like "until", but honestly that's not quite what I'm looking for. I just think there should be a simple way to say "execute this block of code 10 times" without having to wrap it up in recursion. Haskell seems to me to be a very powerful language, and it looks like it should be possible to define control structures such as for loops using monads.