Re: [Haskell-cafe] Haskell code for this example of flow control

briqueabraque:

Hi,

I would like to know what options I have in Haskell to do something similar to this C++ code:

double a = 1000; while (a>1) a/=2;

I'm able to do that with lists, but I would like to know how to do that with monads and variables with state.

You'll get good code using a normal recusive loop: main = print (loop 1000) where loop a | a <= 1 = a | otherwise = loop (a/2) All such control structures may be implemented using recursion. -- Don