#This progam calculates the perimeter and area of different shapes
print(f"This progam calculates the perimeter and area of different shapes")

keep_going = ""
while keep_going == "":
    
    shape = input(f"Choose a shape from square (s), rectangle (r), or circle (c). ")

    #check user input
    shape_change = shape.lower()
    if shape_change == "s":
        print(f"You have chosen square.")
        length = float(input(f"How long is your shape? "))
        area = length * length
        perimeter = length * 4
        print (f"The perimeter of your shape is {perimeter} and the area of your shape is {area}")
    elif shape_change == "r":
        print(f"You have chosen rectangle.")
        width = float(input(f"How wide is your shape? "))
        length = float(input(f"How long is your shape? "))
        area = length * width
        perimeter = length + width * 2
        print (f"The perimeter of your shape is {perimeter} and the area of your shape is {area} ")
    elif shape_change == "c":
        print(f"You have chosen circle.")
        radius = float(input(f"What is the radius? "))
        import math
        area = math.pi * (radius ** 2)
        circumference = 2 * math.pi * radius
        print(f"The area of your shape is {area} and the circumference of your shape is {circumference}")
    else:
        print("That is not one of the selected shapes. Try again.")
        
    keep_going = input("To enter another shape press enter or any key to exit")


print(f"The program has ended...")