# Python program to calculate area and circumference of a circle

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

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

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. 