#This program calculates the perimiter and area of different shapes
print ("This program calculates the area, perimiter and circumference of a shape.. lets begin")

keep_going = ""

while keep_going == "":
    
    shape = input("Enter s for square, r for rectangle or c for circle ")
    if shape == "s" :
        print ("square")
        length = float (input(f"what is the length? "))
        area_s = length * length
        per_s = length * 4
        print (f"the area of the sqare is {area_s}")
        print (f"the perimiter of the sqare is {per_s}")
    elif shape == "r" :
        print ("rectangle")
        top = float (input("what is the length of the top? "))
        side = float (input("what is the length of the side? "))
        area_r = top * side
        per_r = top + side + top + side
        print (f"the area of the rectangle is {area_r}")
        print (f"the perimiter of the rectangle is {per_r}")
    elif shape == "c" :
        print ("circle")
        radius = float (input("what is the radius? "))
        import math
        area_c = math.pi * (radius ** 2)
        circumference = 2 * math.pi * radius
        print (f"the area of the circle is {area_c}")
        print (f"the circumference of the circle is {circumference}")
    else:
        print (f"that isnt a valid shape")
print ("the programis over...")