Hi, To help me in learning Haskell I started blogging about some of the things I’ve looked at. One such topic was calculating square roots ‘by hand’ and then deriving a Haskell algorithm. I wrote about the well known technique here http://gitcommit.co.uk/2017/08/25/the-root-of-the-problem-part-1/ http://gitcommit.co.uk/2017/08/25/the-root-of-the-problem-part-1/ and it it is really quite a simple method. The second part of the post will be an implementation in Haskell. I then tried implementing it and got something that works but really its not very pleasant to look at! And its something I don’t want to post! Some parts are fine but I think I locked myself into the notion that it had to be using State and really the end result is pretty poor. I know this i perhaps a ‘big ask’ but I’d really appreciate any suggestions, solutions, hints etc. I will of course give full attribution. I’ve created a gist of the code here https://gist.github.com/banditpig https://gist.github.com/banditpig Many Thanks Mike