# 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 area (self):

def circumference(self):
return (2 * Circle.PI * self.radius)

r = int(input("Enter the radius of circle"))
c1 = Circle(r)
print ("The area of C1 circle is: ", c1.area())
print ("Circumference of C1 Circle is: ", c1.circumference())
print("")
r = int(input("Enter the radius of circle"))
c2 = Circle(r)
print ("Area of C1 circle is: ", c2.area())
print ("Circumference of C1 Circle is: ", c2.circumference())```

### Output:

Enter the radius of circle 5

The area of C1 circle is: 78.55

Circumference of C1 Circle is: 31.419999999999998

Enter the radius of circle 6

The area of C1 circle is: 113.112

Circumference of C1 Circle is: 37.704