A Class is set of or collection of objects which are dealing within particular Class. In Oops programming language Class word is used id used for number objects which have different-2 behaviors. Class are templates that are used to create objects and to define object data types and methods. Core properties include the data types and methods that may be used by the object. All class objects should have the basic class properties. Class are categories and objects are items within each category. A Class is used in object oriented programming to describe one or more objects. It serves as a template for creating or instantiating, specific objects within a program. While each object is created from a single class one class can be used to instantiate multiple objects. Several programming languages support Class including Java, C++, Objective C, and PHP 5 and later. While the syntax of a class definition varies between programming languages classes serve the same purpose in each language. All classes may contain variable definitions and methods, or subroutines that can be run by the corresponding object.