Calculate Area of a Circle

Theory:

The area of a circle can be calculated using the formula: Area = π * r^2, where r is the radius of the circle and π (pi) is a mathematical constant approximately equal to 3.14159.

Python Code:

import math

def calculate_circle_area(radius):
return math.pi * radius ** 2

# Taking input from the user for the radius
radius = float(input("Enter the radius of the circle: "))
area = calculate_circle_area(radius)
print("Area of the circle with radius", radius, "is:", area)

Example:

Enter the radius of the circle: 5

Area of the circle with radius 5 is: 78.53981633974483

Example:

Enter the radius of the circle: 10

Area of the circle with radius 10 is: 314.1592653589793

Code Explanation:

The function calculate_circle_area(radius) takes the radius of the circle as input and returns its area using the formula π * r^2, where π is the mathematical constant pi and r is the radius.

The example usage section demonstrates how to take input from the user for the radius, calculate the area of the circle, and print the result.