Python Coding challenge - Day 469| What is the output of the following Python Code?

 

Code Explanation:

1. Class Definition

class Circle:

A class named Circle is being defined.

This class will represent a geometric circle and contain methods to operate on it.

2. Constructor Method (__init__)

Edit

def __init__(self, radius): 

    self._radius = radius

The __init__ method is a constructor that is called when a new object of Circle is created.

It takes a radius argument and stores it in a private attribute _radius.

The underscore _ is a naming convention indicating that this attribute is intended for internal use.

3. Area Property Using @property Decorator

@property

def area(self): 

    return 3.14 * (self._radius ** 2)

The @property decorator makes the area() method behave like a read-only attribute.

This means you can access circle.area instead of calling it like circle.area().

The method returns the area of the circle using the formula:

Area=πr 2

 =3.14×(radius) 2

 

4. Creating an Instance of the Circle

print(Circle(5).area)

A new object of the Circle class is created with a radius of 5.

Then, the area property is accessed directly (not called like a function).

5. Final Output

78.5