Also recommend using the following IDE tooling: https://github.com/haskell/haskell-language-server https://github.com/haskell/haskell-language-server Especiall

Also recommend using the following IDE tooling: https://github.com/haskell/haskell-language-server https://github.com/haskell/haskell-language-server Especially easy to setup if you're using VSCode. Lots of Haskell code forgoes type annotations so with this plugin you can simply hover your mouse over things to see the exact type the compiler inferred.