What exactly does “effectful” mean

Question

Time and again I read the term effectful, but I am still unable to give a clear definition of what it means. I assume the correct context is effectful computati

Answer 1

"Effect is a very vague term and that is ok because we are trying to talk about something that is outside the language. Effect and side effect are not the same thing. Effects are good. Side effects are bugs.

Their lexical similarity is really unfortunate because it leads to a lot of people conflating these ideas when they read about them and people using one instead of the other so it leads to a lot of confusion."

see here for more: https://www.slideshare.net/pjschwarz/rob-norrisfunctionalprogrammingwitheffects