What is class variable?
A class variable is an important part of object-oriented programming (OOP), which defines a particular attribute or property for a class and can be referred to as a member variable or a static member variable.
Many object-oriented programming languages (OOP) use a class as a template for a certain type of object. Each individual manifestation of this class is called an instance. Different instances of the same class share common properties and aspects of construction. Many properties of classes are called data fields. Developers also use methods to influence the behavior of a class and its instances. Examples of programming languages that use classes are Java, C. C #, C ++, Microsoft Visual Basic (VB), and PHP.
Since class variables apply to an entire class and all of its instances - even if a particular instance can also have its own variables - there can be confusion in the interaction of class variables and variables that are restricted to a single instance. Programming is about when to define class variables and instance variables and whether these two different types of variables have the potential to overlap or affect each other in an unforeseen way. Although some codes work without a specific definition of class variables, experts often consider adding class variables to be more precise coding.