Question

Write a pyhton program to calculate area of a circle?

Answer 1

The code to calculate the area of a circle is:

from math import pi

def circleArea(radius):

if radius > 0:

return pi * (radius ** 2)

else:

return None

if __name__ == '__main__':

radius = 5

print("Radius: {} Area: {}".format(radius,circleArea(radius)))

Step-by-step explanation:

A detailed explanation of each line of code is given below.

#Define the number pi used to calculate the area

from math import pi

#We define a function that calculates the area of a circle

def circleArea(radius):

#Check if the radius is valid ( radius > 0) since there aren´t negative radius

if radius > 0:

#Compute the area formula for a circle
`\pi * radius^(2)`

return pi * (radius ** 2)

else:

#Return None if the radius is invalid

return None

#Run the function we´ve defined

if __name__ == '__main__':

#Define a radius

radius = 5

#Call the function and parse the radius through it, then print the result

print("Radius: {} Area: {}".format(radius,circleArea(radius)))