Python Coding challenge - Day 885| What is the output of the following Python Code?

 

Code Explanation:

1. Class Definition

class Box:

Defines a new class named Box — a blueprint for creating Box objects that will hold a value n and expose a computed property.

2. Constructor

    def __init__(self, n):

        self._n = n

__init__ is the constructor; it runs when you create a Box instance.

The parameter n is passed in when constructing the object.

self._n = n stores n in the instance attribute _n. By convention the single underscore (_n) signals a “protected” attribute (meant for internal use), but it is still accessible from outside.

3. Property Definition

    @property

    def triple(self):

        return self._n * 3

@property turns the triple() method into a read-only attribute called triple.

When you access b.triple, Python calls this method behind the scenes.

return self._n * 3 computes and returns three times the stored value _n. This does not change _n — it only computes a value based on it.

4. Creating an Instance

b = Box(6)

Creates a Box object named b, passing 6 to the constructor.

Inside __init__, self._n is set to 6.

5. Accessing the Property and Printing

print(b.triple)

Accessing b.triple invokes the triple property method, which computes 6 * 3 = 18.

print outputs the returned value.

Final Output

18

400 Days Python Coding Challenges with Explanation