area of circle in python code example

Example 1: area of a circle python

radius = float(input("Enter radius:"))
pi = 3.14
Area = pi * radius * radius
print("Area = " + str(Area))

Example 2: find the area of a circle in python

import math

radius = 3
area = math.pi * radius * radius
# another way would be to set variable and round - rounded_area = round(area, 3)
print(f'The area of the circle is {area:.3f}')
# round answer to 3 decimal places

Example 3: area of a circle in python

#Area Of A Circle in python
R = int(input("Enter the radius of the circle: "))
PI = 22/7 #This is a constant
A = PI * R * R
print(A)