[Solved] What will be the output of this code?class Circle: pi = 3.14 def __init__(self, radius): self.radius = radius @classmethod def area(cls, radius): return cls.pi * radius * radius print(Circle.area(5)) | Python

Python - Class Methods and Static Methods

What will be the output of this code?

class Circle:
    pi = 3.14

    def __init__(self, radius):
        self.radius = radius

    @classmethod
    def area(cls, radius):
        return cls.pi * radius * radius

print(Circle.area(5))

A78.5

BError: missing self

C15.7

DNone

Step-by-Step Solution

Solution:

Step 1: Understand class method usage
The class method area uses cls.pi and the radius argument to calculate area.
Step 2: Calculate area
Area = 3.14 * 5 * 5 = 78.5, which is returned and printed.
Final Answer:
78.5 -> Option A
Quick Check:
Class method uses cls.pi correctly = 78.5 [OK]

Quick Trick: Class methods can use class variables without instance [OK]

Common Mistakes:

MISTAKES

Expecting self in class method
Confusing class and instance variables
Miscomputing area formula

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What will be the output of this code?

Step 1: Understand class method usage

Step 2: Calculate area

Final Answer:

Quick Check:

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