Python Coding challenge - Day 833| What is the output of the following Python Code?

 

Code Explanation:

Defining the class

class Squares:

This line defines a new class named Squares.

A class is a blueprint for creating objects and can contain attributes (data) and methods (functions).

Defining the constructor (__init__)

    def __init__(self, nums):

        self.nums = nums

__init__ is the constructor method — it runs automatically when a new object is created.

nums is passed as an argument when creating the object.

self.nums = nums stores the list in the instance variable nums, so each object has its own nums.

Defining a method sum_squares

    def sum_squares(self):

        return sum([n**2 for n in self.nums])

sum_squares is a method of the class.

[n**2 for n in self.nums] is a list comprehension that squares each number in self.nums.

Example: [2,3,4] → [4,9,16]

sum(...) adds all the squared numbers: 4 + 9 + 16 = 29.

The method returns this total sum.

Creating an object of the class

obj = Squares([2,3,4])

This creates an instance obj of the Squares class.

nums = [2,3,4] is passed to the constructor and stored in obj.nums.

Calling the method and printing

print(obj.sum_squares())

obj.sum_squares() calls the sum_squares method on the object obj.

The method calculates: 2**2 + 3**2 + 4**2 = 4 + 9 + 16 = 29

print(...) outputs the result: 29

Final Output

29

700 Days Python Coding Challenges with Explanation