Python Coding challenge - Day 882| What is the output of the following Python Code?

 

Code Explanation:

1. Class Definition

class Box:

You define a class named Box, which will represent an object containing a number.

2. Constructor Method

    def __init__(self, n):

        self._n = n

Explanation:

__init__ is the constructor that runs when a new object of Box is created.

It receives the parameter n.

self._n = n stores the value in an attribute named _n.

The single underscore (_n) indicates it is a protected variable (a naming convention).

3. Property Decorator

    @property

    def double(self):

        return self._n * 2

Explanation:

@property turns the method double() into a read-only attribute.

When you access b.double, Python will automatically call this method.

It returns double of the stored number (_n * 2).

4. Creating an Object

b = Box(7)

Explanation:

Creates a new object b of class Box.

Calls __init__(7), so _n becomes 7.

5. Accessing the Property

print(b.double)

Explanation:

Accesses the property double.

Calls the method internally and returns 7 * 2 = 14.

The output printed is:

Output

14

100 Python Programs for Beginner with explanation