> The functional aspects mean every function has no side effect. This is not accurate. Any function can print, can call a DB or a web service. "Purity" (as i

> The functional aspects mean every function has no side effect. This is not accurate. Any function can print, can call a DB or a web service. "Purity" (as in referentially transparent) is tangential to function programming. It can be achieved with other paradigms. That being said, functional programming does encourage it.