How to Write a Python Program to Find the Area of a Circle
In this video, we’ll learn how to write a simple Python program to calculate the area of a circle when the radius is given. We’ll use the formula Area = π × r², where π (pi) is a constant, and r is the radius of the circle. This tutorial is perfect for beginners who want to understand basic Python programming concepts.
What You’ll Learn in This Video:
How to use the math module in Python to access the value of π (pi).
How to take user input using the input() function and convert it to a numeric value using float().
How to perform calculations using Python and display the result using f-strings.
How to format the output to display the area with two decimal places for better readability.
Steps Covered in the Program:
Import the math module to access the value of π.
Prompt the user to enter the radius of the circle using the input() function.
Convert the user input from a string to a floating-point number using float().
Calculate the area using the formula Area = π × r².
Display the result using the print() function and format the output to two decimal places.
Example Output:
If the user enters a radius of 5, the program will output:
"Area of the circle with radius 5 is 78.54."
If the user enters a radius of 15, the program will output:
"Area of the circle with radius 15 is 706.86."
Code Snippet:
import math
Ask the user to enter the radius
radius = float(input("Enter the radius of the circle: "))
Calculate the area
area = math.pi * radius * radius
Display the result
print(f"Area of the circle with radius {radius} is {area:.2f}")
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