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Python Program to Find Area of a Circle

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The area of a circle can simply be evaluated using the following formula.

Area = pi * r2
where r is radius of circle

Python Program to Find Area of a Circle

Python3




# Python program to find Area of a circle
 
def findArea(r):
    PI = 3.142
    return PI * (r*r);
 
# Driver method
print("Area is %.6f" % findArea(5));


Output

Area is 78.550000

Time Complexity: O(1) since no loop is used the algorithm takes up constant time to perform the operations
Auxiliary Space: O(1) since no extra array is used so the space taken by the algorithm is constant

Python Program to Find Area of a Circle With Math library

Python3




# Python program to find Area of a circle
# using inbuild library
 
import math
def area(r):
  area = math.pi* pow(r,2)
  return print('Area of circle is:' ,area)
area(4)


Output

Area of circle is: 50.26548245743669

Time Complexity: O(1)
Auxiliary Space: O(1)

Please refer complete article on Program to find area of a circle for more details!


Last Updated : 03 Jul, 2023
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