Python Coding challenge - Day 875| What is the output of the following Python Code?

 Code Explanation:

1. Class definition

class Num:

Defines a class named Num. Instances of Num will hold a numeric value and support a custom subtraction behavior.

2. Constructor (__init__)

    def __init__(self, x):

        self.x = x

__init__ runs when a Num object is created.

It accepts parameter x and stores it on the instance as self.x.

3. Overloading subtraction (__sub__)

    def __sub__(self, other):

        return Num(self.x // other.x)

__sub__ is a magic method that defines what a - b does when a and b are Num objects.

Inside, it computes the floor division of the two stored values: self.x // other.x.

Floor division // divides and then rounds down to the nearest integer.

It creates and returns a new Num object initialized with that result (original objects are not modified).

4. Create first object

n1 = Num(20)

Instantiates n1 with x = 20.

5. Create second object

n2 = Num(3)

Instantiates n2 with x = 3.

6. Subtract and print the result

print((n1 - n2).x)

n1 - n2 calls Num.__sub__: computes 20 // 3 which equals 6.

__sub__ returns a new Num object with x = 6.

(n1 - n2).x accesses that new object’s x attribute.

print outputs:

6

Final output

6

500 Days Python Coding Challenges with Explanation