Python Coding challenge - Day 980| What is the output of the following Python Code?

 

Code Explanation:

1. Defining the Class

class A:

A class named A is defined.

2. Declaring a Class Variable

    count = 0

count is a class variable.

It belongs to the class A, not to individual objects.

Initially:

A.count == 0

3. Defining the Constructor (__init__)

    def __init__(self):

        self.count += 1

__init__ runs every time an object of A is created.

self.count += 1 works like this:

Python looks for count on the object (self) → not found

It then looks at the class → finds A.count

Reads the value (0)

Adds 1

Creates a new instance variable self.count

Important:

This does NOT modify A.count — it creates an instance attribute.

4. Creating First Object

a = A()

__init__ runs.

self.count += 1 → a.count = 1

Now:

a.count == 1

A.count == 0

5. Creating Second Object

b = A()

__init__ runs again.

self.count += 1 → b.count = 1

Now:

b.count == 1

A.count == 0

6. Printing the Values

print(a.count, b.count, A.count)

a.count → instance variable → 1

b.count → instance variable → 1

A.count → class variable → 0

7. Final Output

1 1 0

Final Answer

✔ Output:

1 1 0

100 Python Programs for Beginner with explanation