### Python program to find the area and circumference of Circle

### Problem Definition:

Write a python program that has a class named Circle. Use a class variable to define the value of a constant PI. Use this class variable to calculate the area and circumference of a circle with the specified radius.

### Source code of Python program to find the area and circumference of Circle

class Circle: PI = 3.142 def __init__(self, radius): self.radius = radius def area (self): return (Circle.PI * self.radius * self.radius) def circumference(self): return (2 * Circle.PI * self.radius) r = int(input("Enter the radious of circle")) c1 = Circle(r) print ("Area of C1 circle is: ", c1.area()) print ("Circumference of C1 Circle is: ", c1.circumference()) print("") r = int(input("Enter the radious of circle")) c2 = Circle(r) print ("Area of C1 circle is: ", c2.area()) print ("Circumference of C1 Circle is: ", c2.circumference())

### Output:

Enter the radious of circle5 Area of C1 circle is: 78.55 Circumference of C1 Circle is: 31.419999999999998 Enter the radious of circle6 Area of C1 circle is: 113.112 Circumference of C1 Circle is: 37.704