Task: write results to text file

In Exercise 3 on functions you were asked to define a function circleArea() which takes in one parameter radius and returns the Area of a circle with the given radius. Using the function, update the following code so that you store the output into a text file Circle_areas.txt on your computer:

textfile = "Circle_areas.txt" #Update full filepath if needed

# Update the variable result for different radius, and save the text into a text file (one result per row)
for r in range(5):

    # Generate the result sentence and store it in a variable:
    result = 'The area for a circle with a radius of ' + str(r) + ' mm is ' + str(circleArea(r))+' mm^2'

    # Save the contents of the variable result to the textfile
    # your code here!!