Reading-notes

OOP (Object-oriented programming ):

• Object-oriented programming is a model that provides different types of concepts, such as inheritance, abstraction, polymorphism, etc, to improve code readability and reusability by defining a Java program efficiently.

• What Is a Class?
• A class is a user defined blueprint or prototype from which objects are created. It represents the set of properties or methods that are common to all objects of one type.

Binary, Decimal and Hexadecimal Numbers

• Decimals :

• The Decimal Number System is also called Base 10, because it is based on the number 10, with these 10 symbols: 0, 1, 2, 3, 4, 5, 6, 7, 8 and 9 Type :(float and double)

• Binary:

• in the binary we have two digits (0,1) and it base (2)

• Hexadecimal :

• They look the same as the decimal numbers up to 9, but then there are the letters (“A’,”B”,”C”,”D”,”E”,”F”) in place of the decimal numbers 10 to 15.