What role do parameters play in a constructor?

Parameters in a constructor are essential for initializing class attributes when an object is created. By providing parameters to a constructor, you allow the object to be instantiated with specific initial values, ensuring that the attributes of the class reflect the desired state right from the moment the object is created. This enhances the flexibility and usability of the class since different instances can be initialized with different values based on the arguments provided.

For example, consider a class representing a rectangle. By including parameters such as width and height in the constructor, you can create rectangles of varying sizes at the point of creation. This use of parameters in constructors is a fundamental aspect of object-oriented programming, facilitating customization and encapsulation right at the object instantiation stage.