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closed I made a Area of a circle calculator for school, how do I use a while loop to ask for the radius again?

+2 votes
asked Sep 20 by Ben Roberts (210 points)
closed 3 days ago by Ben Roberts

Link to the project https://onlinegdb.com/2--AfMAmvT

closed with the note: Answered

1 Answer

0 votes
answered 6 days ago by Peter Minarik (58,220 points)

Here's an example of how to do it.

I also used math.pi to have higher accuracy and used a new variable for the area not to confuse anyone as for you, the variable rad is not containing the radius anymore, but the area in the end.

import math

print("Welcome to Area of a Circle Calculator. Please enter the Radius of the circle. Enter an invalid radius (less than 0) to quit.")
rad = float(input("r = "))
while (rad >= 0):
    area = rad *rad * math.pi
    print(f"The area of the circle is {area}.")
    rad = float(input("r = "))
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