This python article has the main purpose to show you, how to calculate the area when the user input radius of the circle or find the Area of a circle. Also, we would love to share with you an algorithm to calculate the area based on a given radius of circle.
First of all, you should know what is area of circle and also, find the area of circle formula.
What is area of circle?
The area of a circle is the number of square units inside that circle. If each square in the circle to the left has an area of 1 cm2, you could count the total number of squares to get the area of this circle.
What is area of circle formula?
The area of a circle can be found by multiplying pi ( π = 3.14) by the square of the radius. e.g. If a circle has a radius of 5, its area is 3.14*5*5=78.53.
Algorithm to find the Area of a circle in python
- Import math module in python program.
- Take input number from user.
- Calculate area of the circle with a given radius by using formula pi * r**2.
- Print result.
Write a python program which accept the radius of a circle from the user and compute the area.
# 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