What is Constructor?

A constructor in programming is a special method or function that is automatically called when an object of a class is created. Its main purpose is to initialize the object's attributes or properties and set up any necessary resources or configurations.

Key Characteristics of Constructors:

  • Same Name as the Class: A constructor has the same name as the class it belongs to. This association is what identifies it as the constructor.
  • Automatic Invocation: The constructor is automatically called when an object of the class is created. It ensures that the object is properly initialized before it is used.
  • Initialization: Constructors are used to initialize the attributes or properties of an object. They set the initial values for the object's state.
  • No Return Type: Unlike regular methods, constructors do not have a return type. They are implicitly called when an object is instantiated, and their purpose is to initialize the object.

Types of Constructors:

  • Default Constructor: A constructor with no parameters. If a class doesn't have any constructor defined, a default constructor is implicitly provided.
  • Parameterized Constructor: A constructor with parameters that allow the caller to provide values for the object's attributes during instantiation.

Constructors play a crucial role in object-oriented programming by ensuring that objects are set up correctly when they are created, helping to avoid potential issues related to uninitialized or improperly initialized objects.