Exercise 2:
The Area of a Circle in Python
Write a program in Python which receives the radius of a circle as the input and then calculates and prints its area.
Code:
r = float(input("Radius = "))
pi = 3.14159265359
s = pi*r*r
print("Area = ", s)
Run:
============== RESTART: C:\area of a circle fa.py =============
Radius = 1
Area = 3.14159265359
>>>
============== RESTART: C:\area of a circle fa.py =============
Radius = 2.5
Area = 19.634954084937497
>>>
============== RESTART: C:\area of a circle fa.py =============
Radius = 643
Area = 1298888.341034132
>>>
============== RESTART: C:\area of a circle fa.py =============
Radius = 0
Area = 0.0
>>>