This python program/script calculates and prints the area and circumference of a circle. In both the cases, the user enters the radius of the circle.
Prerequisite knowledge:
- Value of pi is equal to the ratio of the circumference to the diameter of the circle, which is 22/7 or 3.14 as used in basic calculations.
- Importing a module in python
- Syntax of basic python statements.
Program #1 : Python program to calculate area and circumference using math.pi
import math radius = float(input("Enter the radius: ")) area = math.pi * radius * radius cir = 2 * math.pi * radius print("Area of the circle is: %.2f" %area) #%.2f to print upto 2 decimal places print("Circumference of the circle is: %.2f" %cir)
Output:
Enter the radius: 9
Area of the circle is: 254.47
Circumference of the circle is: 56.55
Program #2 – Python program to calculate area and circumference using PI object
PI = 3.14 radius = float(input("Enter the radius: ")) area = PI * radius * radius cir = 2 * PI * radius print("Area of the circle is: %.2f" %area) print("Circumference of the circle is: %.2f" %cir)
Output:
Enter the radius: 8
Area of the circle is: 200.96
Circumference of the circle is: 50.27
If you have any queries, let us know in the comments.