Best REPL

What's 1 + 2? Let's ask Elm:

---- elm-repl 0.17.1 ----------------------------------------------------------- :help for help, :exit to exit, more at <https://github.com/elm-lang/elm-repl> -------------------------------------------------------------------------------- > 1+2 Error: The following HTTP request failed. <http://package.elm-lang.org/all-packages?elm-package-version=0.17.1&since=2016-10-24%2008%3A52%3A34.764973%20UTC> FailedConnectionException2 "package.elm-lang.org" 80 False getAddrInfo: does not exist (Name or service not known)

The most interesting result of any REPL I've ever seen. Will try to convince the workplace to use it.