Use of that type is easily limited in Haskell code. For instance, in my chess counting project [1] only a few lines in Main.hs use IO (), while the other approx

Use of that type is easily limited in Haskell code. For instance, in my chess counting project [1] only a few lines in Main.hs use IO (), while the other approximately thousand lines of code have nothing to do with IO (). [1] https://github.com/tromp/ChessPositionRanking https://github.com/tromp/ChessPositionRanking