Python Coding challenge - Day 830| What is the output of the following Python Code?

 

Code Explanation:

1) Define the class

class MathOps:

This starts the definition of a class named MathOps. A class is a blueprint for creating objects and can contain data (attributes) and functions (methods).

2) Class variable factor

    factor = 2

factor is a class attribute (shared by the class and all its instances).

It is set to the integer 2. Any method that references cls.factor or MathOps.factor will see this value unless it is overridden.

3) Declare a class method

    @classmethod

The @classmethod decorator marks the following function as a class method.

A class method receives the class itself as the first argument instead of an instance. By convention that first parameter is named cls.

Class methods are used when a method needs to access or modify class state (class attributes) rather than instance state.

4) Define the multiply method

    def multiply(cls, x):

        return x * cls.factor

multiply is defined to accept cls (the class) and x (a value to operate on).

cls.factor looks up the factor attribute on the class cls.

The method returns the product of x and cls.factor. Because factor = 2, this computes x * 2.

5) Call the class method and print result

print(MathOps.multiply(5))

MathOps.multiply(5) calls the class method with cls bound to the MathOps class and x = 5.

Inside the method: 5 * MathOps.factor → 5 * 2 → 10.

print(...) outputs the returned value.

Final output

10

600 Days Python Coding Challenges with Explanation