Why declare variables private in a class? [closed]

Answer 1

Pizza Delivery Analogy

1. You order a Pizza for delivery.
2. Pizza boy knocks the door and expects you to pay for it.
3. You take out the money from your purse and hand it over to the delivery boy. (You are in control of hiding the internal details (drivers license etc.)) Alternatively,
   • You could hand over the purse to the delivery boy and ask him to take the money from it. By doing this you are no longer in control. You are exposing internal details.

Read about Information Hiding and Encapsulation is not information hiding.