Need help with my sample code - functions

Question

print area of circle using custom function:

import math
r = input("Enter the radius: ")
def circleArea():
return math.pi*pow(r,2)
print("Area is ", circleArea())

I am getting an error message

Answer 1

import math
r = float(input("Enter the radius: "))
def circleArea():
return math.pi*pow(r,2)
print("Area is ", circleArea())

Answer 2

The r you get from input has type string, while the pow function requires an input of a numeric data type. This should work:

import math
def circleArea(radius):
return math.pi*radius*radius

r = float(input("Enter the radius:\n"))
print("Area is", circleArea(r))

Answer 3

Anytime Ved

Answer 4

Thanks Meharban and Tobi for the answers. 'float' was missing.