How to explain callbacks in plain english? How are they different from calling one function from another function?

Question

How to explain callbacks in plain English? How are they different from calling one function from another function taking some context from the calling function? How can thei

Answer 1

You feel ill so you go to the doctor. He examines you and determines you need some medication. He prescribes some meds and calls the prescription into your local pharmacy. You go home. Later your pharmacy calls to tell you your prescription is ready. You go and pick it up.