again = "y"

while str.lower(again)=="y":
    answer = input("Do you want to calculate the volume of a cuboid or cylinder? ")
    realPi = float(3.14159)

    def cylindervol(radius,length):
        realVolume = realPi*realRadius*realLength
        print('The volume of the cylinder is ')
        print(realVolume)

    def cuboidvol():
        realVolume = realHeight*realWidth*realLength
        print("The volume of the cuboid is ")
        print(realVolume)
        
    if str.lower(answer)=="cylinder":
        realRadius=float(input('Enter the radius of the cylinder : '))
        realLength=float(input('Enter the length of the cylinder : '))
        cylindervol(realRadius,realLength)
        again = input('Do you want to calculate another?(y or n)')

    
    if str.lower(answer)=="cuboid":
        realWidth=float(input('Enter the width of the cuboid : '))
        realLength=float(input('Enter the length of the cuboid : '))
        realHeight=float(input('Enter the height of the cuboid : '))
        cuboidvol()
        again = input('Do you want to calculate another?(y or n)')