Area of Circle in Python

The formula for the area of a circle is Area = π × radius². In Python, we use either 3.14 or the math.pi constant for π. Let's calculate area using both fixed and user-input radius.

क्वृम का क्षेत्रफल है एरिया = π × radius². Python में या तो 3.14 या math.pi की मदद लेकर area calculate करते हैं।

Example 1: Using Fixed Radius

radius = 7
area = 3.14 * radius * radius
print("Area =", area)

Output:

Area = 153.86

Calculates area using fixed value of radius.

Example 2: User Input for Radius

radius = float(input("Enter radius: ") )
area = 3.14 * radius * radius
print("Area =", area)

Output:

Enter radius: 5
Area = 78.5

Takes radius input from user and prints area.

Example 3: Using math.pi

import math
radius = float(input("Enter radius: ") )
area = math.pi * radius ** 2
print("Area =", area)

Output:

Enter radius: 4
Area = 50.26548245743669

More accurate area using math.pi.