Python Coding challenge - Day 582| What is the output of the following Python Code?

 Code explanation:

Line 1: Class Definition

class A:

This defines a new class named A.

A class is a blueprint for creating objects in Python.

Line 2: Class Variable Declaration

val = 1

Inside the class A, a class variable val is defined and initialized to 1.

This variable is shared across all instances of the class unless overridden by an instance variable.

Think of this as: A.val = 1

Line 3: Constructor Method

def __init__(self):

This is the constructor method, which is automatically called when a new object of class A is created.

self refers to the instance being created.

Line 4: Instance Variable Modification

self.val += 1

This line tries to increment the value of self.val by 1.

Since self.val doesn't exist yet as an instance variable, Python looks up to the class variable A.val, which is 1.

Then it creates an instance variable self.val and sets it to 1 + 1 = 2.

Internally:

self.val = self.val + 1

# self.val is not found → looks up A.val → finds 1 → sets self.val = 2

Line 5: Object Creation

a = A()

An object a of class A is created.

This automatically calls the __init__ method, which sets a.val = 2.

Line 6: Output

print(a.val)

Prints the value of the instance variable val of object a, which is 2.

Final Output:

2

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