Exercise 1

First Python exercise

🎖️

Write a Python program to create a class representing a Circle. Include methods to calculate its area and perimeter.

Plain code approach

In the above exercise we create a “Person” class with properties for name, age, and country. It includes a method to display the person’s details.
Finally it creates two instances of the Person class and displays their details using the displayDetails() method.

Solution:

# Import the math module to access mathematical functions like pi
import math

# Define a class called Circle to represent a circle
class Circle:
  # Initialize the Circle object with a given radius
  def __init__(self, radius):
      self.radius = radius
  
  # Calculate and return the area of the circle using the formula: π * r^2
  def calculate_circle_area(self):
      return math.pi * self.radius**2
  
  # Calculate and return the perimeter (circumference) of the circle using the formula: 2π * r
  def calculate_circle_perimeter(self):
      return 2 * math.pi * self.radius

# Example usage
# Prompt the user to input the radius of the circle and convert it to a floating-point number
radius = float(input("Input the radius of the circle: "))

# Create a Circle object with the provided radius
circle = Circle(radius)

# Calculate the area of the circle using the calculate_circle_area method
area = circle.calculate_circle_area()

# Calculate the perimeter of the circle using the calculate_circle_perimeter method
perimeter = circle.calculate_circle_perimeter()

# Display the calculated area and perimeter of the circle
print("Area of the circle:", area)
print("Perimeter of the circle:", perimeter)

Sample output

Input the radius of the circle: 4
Area of the circle: 50.26548245743669
Perimeter of the circle: 25.132741228718345

Exercise 2