Newfag ascension

intLowestNumber = 0
intHighestNumber = 00
intMiddleNumber = 0
userinput = int(input('Enter a number: '))
while userinput != 0:
    if userinput > intHighestNumber:
        intHighestNumber = userinput

    if userinput < intHighestNumber:
        intMiddleNumber = userinput

    if userinput < intHighestNumber:
        intLowestNumber = userinput
    userinput = int(input('Enter a number: '))

print('Lowest:%s Highest:%s' % (intLowestNumber, intHighestNumber))