In this tutorial we are going to learn about creating a Class and Compute the Area and the Perimeter of the Circle in Python.

Python Program to Create a Class and Compute the Area and the Perimeter of the Circle

import math
class circle():
    def __init__(self,radius):
        self.radius=radius
    def area(self):
        return math.pi*(self.radius**2)
    def perimeter(self):
        return 2*math.pi*self.radius
 
r=int(input("Enter radius of circle: "))
obj=circle(r)
print("Area of circle:",round(obj.area(),2))
print("Perimeter of circle:",round(obj.perimeter(),2))

Program Explanation

1. User must enter the value of radius.
2. A class called circle is created and the init() method is used to initialize values of that class.
3. A method called as area returns math.pi*(self.radius**2) which is the area of the class.
4. Another method called perimeter returns 2math.piself.radius which is the perimeter of the class.
5. An object for the class is created.
6. Using the object, the methods area() and perimeter() are called.
7. The area and perimeter of the circle is printed.