#------------------------------------------------------------------------------
#  Circle3.py
#  Uses functions
#------------------------------------------------------------------------------

import math

# circle_area()
# computes the area of a circle
def circle_area(r):
   a = math.pi*(r**2)
   return a
# end circle_area()


# circle_circumference()
# computes the circumference of a circle
def circle_circumference(r):
   c = 2*math.pi*r
   return c
# end circle_circumference()


# print_circle()
# prints area and circumference of circle
def print_circle(r):
   a = circle_area(r)
   c = circle_circumference(r)
   # print the circumference and area of the circle
   print("The area of the circle is:", a)
   print("The circumference of the circle is:", c)
# end print_circle()



#-- main program --------------------------------------------------------------

print() # blank line

# get the radius of a circle and print its area and circumference
radius_string = input("Enter the radius of a circle: ")
print_circle(float(radius_string))

print() # blank line

# get the radius of another circle and print its area and circumference
radius_string = input("Enter the radius of another circle: ")
print_circle(float(radius_string))

print() # blank line

# end program -----------------------------------------------------------------