What are "Pure Functions" and "Side Effects"?

You might've heard about "pure functions". Maybe also about "side effects" or "impure functions". There is no wrong or right here - you will need all these things in most applications, but it is crucial to understand what these terms actually means and what you should watch out for.

What is "State": https://youtu.be/g8-Xrpl_Uhk

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Видео What are "Pure Functions" and "Side Effects"? канала Academind