Referential Transparency

Referential transparency: replacing an expression by its bound value doesn’t alter the behaviour of your program. This gives huge benefits, which I’ll talk about later.

References #

• https://www.reddit.com/r/scala/comments/8ygjcq/can_someone_explain_to_me_the_benefits_of_io/
• https://www.youtube.com/watch?v=x3GLwl1FxcA&t=189s