Python: Input the radius of a circle and compute the area

Python Basic: Exercise-4 with Solution

Write a Python program which accepts the radius of a circle from the user and compute the area.

Python: Area of a Circle

In geometry, the area enclosed by a circle of radius r is πr2. Here the Greek letter π represents a constant, approximately equal to 3.14159, which is equal to the ratio of the circumference of any circle to its diameter.

Sample Solution:-

from math import pi

r = float(input ("Input the radius of the circle : "))

print ("The area of the circle with radius " + str(r) + " is: " + str(pi * r**2))

=========== RESTART: F:/Python_APSC/py-ex-basic-4.py ============

Input the radius of the circle : 10

The area of the circle with radius 10.0 is: 314.1592653589793

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