Python Coding challenge - Day 699| What is the output of the following Python Code?

 

Code Explanation:

1) class A:

Defines a new class A.

Classes group together data (attributes) and behavior (methods).

2) def __init__(self, x):

This is the constructor (initializer) for the class.

It runs automatically whenever a new object of A is created.

Parameters:

self → reference to the object being created.

x → value passed at creation.

3) self._x = x

Inside the constructor, the parameter x is stored in an instance variable _x.

_x is a naming convention to indicate "private" (internal use only), though it’s not truly private in Python.

4) @property

This decorator turns a method into a read-only attribute.

That means you can access a.x like an attribute, not a.x().

It’s often used to create computed attributes.

5) def x(self):

This method defines how the property x behaves when accessed.

Returns self._x + 1.

So, instead of giving back the raw _x, it always gives one more.

6) a = A(5)

Creates an object a of class A, passing 5 to the constructor.

Inside __init__:

self._x = 5.

So now the object stores _x = 5.

7) print(a.x)

Accessing a.x → triggers the property method def x(self).

That method computes self._x + 1 = 5 + 1 = 6.

Prints:

6

Final Output

6

500 Days Python Coding Challenges with Explanation