Classes and Objects

As described above, a class describes what data an object can hold and what it can do with that data. For example, consider we have to create a Book object and store the data mentioned in the example above. But first, we have to specify what a Book object looks like, i.e. declare a Book class.

In the class declaration, we specify the following:

• the variables that will store data (attributes)

• a function that gets called whenever we create a new object (constructor)

• function(s) that can access the attributes and use the values for processing (methods)