Unsupported operand type from a function

Question

Write a Python program which accepts the radius of a circle from the user and compute the area. Go to the editor Sample Output : r = 1.1 Area = 3.8013271108436504

My code:

def rad_to_area(rad):
    from math import pi
    area = pi * (rad**2)
    return area
radius = input('Enter radius of circle: ')
print('The area of the circle is', rad_to_area(radius))

Error:

Traceback (most recent call last):
  File "/tmp/sessions/167965d8c6c342dd/main.py", line 6, in <module>
    print('The area of the circle is', rad_to_area(radius))
  File "/tmp/sessions/167965d8c6c342dd/main.py", line 3, in rad_to_area
    area = pi * (rad**2)
TypeError: unsupported operand type(s) for ** or pow(): 'str' and 'int'

Could someone please explain what I am doing wrong?

Thanks

score 0 · Answer 1 · answered Jul 20 '20 at 08:29

0

The input method is a string and to do power operations on the radius you need to cast it as a float first.

def rad_to_area(rad):
    from math import pi
    area = pi * (rad**2)
    return area
radius = float(input('Enter radius of circle: ')) #Casting as a float here
print('The area of the circle is', rad_to_area(radius))

answered Jul 20 '20 at 08:29

Edeki Okoh

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Thanks Edeki. How long did it take you to become proficient? Doubts are starting to enter now – Deepak47 Jul 20 '20 at 10:34
If you want you can look at my profile and message me at any of the links there to talk in person. – Edeki Okoh Jul 20 '20 at 23:43

Unsupported operand type from a function

1 Answers1