https://www.dotnetzone.gr:443/cs/blogs/ppolyzos/archive/2017/02/10/running-elixir-s-interactive-shell-iex-in-powershell.aspxIEx is Elixir’s interactive shell, where you can type any Elixir expressions and get its result. One issue you might come across when trying to use iex in Powershell, through a command e.g. iex -S mix, you might get the following error: [crayon-589dd336d7efc799259712/]enCommunityServer 2.1 SP3 (Build: 20423.1)