What is the purpose of a class in X++, and what elements can it contain?

A class in X++ is used to define data and create objects. The data that is defined in a class represents the state of the object and is stored in variables. Classes also contain methods, which define the behavior of the object. The key elements of a class in X++ include the class declaration, instance variables, and methods. The class declaration includes the name of the class, the instance variables, and other modifiers such as private, protected, and public to determine the visibility of the variables.