#shape perimter calulator v2

print ("this program calulates the preimeter and area of differnt shapes")

keep_going = ""
while keep going == "",


   shape = input("choose a shape from square or circle pr rectangle ")

   if shape =="s":
      print ("rectangle")
      side = float(input("enter the length of a side "))
      square_perimeter =side*4
      square_area = side*2
      print(f"The perimeter is {square_perimeter}, the area is {square_area} ")
   elif shape = "r":
       print ("rectangle")
       length = float(input("enter the length of the rectangle "))
       width = float(input("enter the width of the rectangle "))
       perimeter = (length + width) *2
       area = width * length
       print(f"The perimeter is {perimeter}, the area is {area} ")

   elif shape =="c":
      print ("circle")
      radius =float(input("what is the radius "))
      area = (2 * radius) *3.141
      circumference = 3.141 * radius**2
      print (f"the area of the circle {area} the circumference is {circumference}")
   else:
      print("that is not a valid shape")
      
   keep_going = input ("to enter another shape press enter or any key to exit")
   
   print("program has eneded")