Python program to find area of circle using radius
Write a python program to input circle radius(r) from the user and calculate area of circle(A).
Formula is,
A=Πr22
Where,
- Π - constant value (3.141592653589793)
- r - radius of the circle
example.py
import math r=float(input("Enter the radius of a circle : ")) a=math.pi*r*r print("Area of Circle is %.2f"%a)
Output
Enter the radius of a circle : 5 Area of Circle is 78.54
math.pi constant returns the value of pi : 3.141592653589793