A constructor is a special method used to initialize an object.

In Python, the constructor method is named __init__.

Constructors are mainly used to declare and initialize instance variables when an object is created.

class Student:
    def __init__(self, name, rollno, marks):
        self.name = name
        self.rollno = rollno
        self.marks = marks

• Executed automatically when the object is created
• Runs only once for each object
• Can take arguments
• Is optional