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

**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.