Module 3: Abstraction

1. What is abstraction? Abstraction is showing only the necessary data, hiding the unwanted data.

keyword: abstract

1. How to achieve the abstraction?
2. keyword: abstract
3. Use the keyword and achieve the abstraction.
4. We can't create the object in abstract class.

5. We can use the abstract keyword in method and class also.

6. Where is use to the abstract method?
   We can create the multiple definition by using the abstract method.

EX: Login page.