Print Area of a circle using Python

Let us write a small program today to print the area of circle in Python. The program will accept user input in the form of radius of the circle. There is a constant pi whose value we will be set to 3.142

Code :

print ('Program to calculate area of circle \n')

pi = 3.142
r = float(input('Enter radius : '))

a = pi*(r**2)

print ('Area of circle :', a )

Output :

OR