Python Coding challenge - Day 857| What is the output of the following Python Code?

 

Code Explanation:

1. Class Definition

class Box:

A new class named Box is created.

Objects of this class will store a number and support a custom subtraction operation.

2. Constructor Method (__init__)

    def __init__(self, n):

        self.n = n

The constructor runs whenever a Box object is created.

It takes one parameter n.

self.n = n stores the value in the object's attribute n.

Each Box object will now hold its own number.

3. Operator Overloading (__sub__)

    def __sub__(self, other):

        return Box(self.n * other.n)

This overrides the - (subtraction) operator.

Instead of subtracting, it multiplies the values (self.n * other.n).

It returns a new Box object containing the result.

Example: b1 - b2 is interpreted as b1.__sub__(b2).

4. Creating the First Object

b1 = Box(2)

A new Box object is created with n = 2.

Internally: b1.n = 2.

5. Creating the Second Object

b2 = Box(5)

Another Box object is created with n = 5.

Internally: b2.n = 5.

6. Using the Overloaded - Operator

print((b1 - b2).n)

b1 - b2 calls the overloaded method:

b1.__sub__(b2)

Inside __sub__:

self.n * other.n → 2 * 5 = 10

A new Box object is created with n = 10.

(b1 - b2).n prints 10.

Final Output

10

400 Days Python Coding Challenges with Explanation