Python program to input radius of a circle and calculate area of a circle; Through this tutorial, i am going to show you how to write python program which accepts the radius of a circle from the user and compute or find the area of circle.

In this tutorial, i will write a python program to find area of a circle based on user input radius of circle.

## Python – Input the Radius of Circle and Compute the Area

- Write a program to input radius of a circle and calculate its area in python

### Program to input radius of a circle and calculate its area in python

Use the following steps and write a program to input radius of a circle and calculate its area in python:

- Import math module in python program.
- Get input number from user.
- Calculate
**area**of the**circle**with a given radius by using formula**pi * r**2.** - Print result.

# import math module from math import pi # take input from user r = float(input ("Input the radius of the circle : ")) # compute the area from radius of a circle given by user calculateArea = str(pi * r**2); #print result print ("The area of the circle with radius " + str(r) + " is: " + calculateArea)

After executing the program, the output will be:

Input the radius of the circle : 2 The area of the circle with radius 2.0 is: 12.566370614359172

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