Lab Acitivtiy 4

import random

# Variables for the words
numstring = ["", "One", "Two", "Three", "Four", "Five", "Six", "Seven", "Eight", "Nine"]
# Variation of the first numstring that is used for one-digit numbers
numstringZero = ["Zero", "One", "Two", "Three", "Four", "Five", "Six", "Seven", "Eight", "Nine"]
numstringTens = ['', '', 'Twenty', 'Thirty', 'Forty', 'Fifty', 'Sixty', 'Seventy', 'Eighty', 'Ninety']
numstringOnes = ['Ten', 'Eleven', 'Twelve', 'Thirteen', 'Fourteen', 'Fifteen', 'Sixteen', 'Seventeen', 'Eighteen',
                 'Nineteen']

# Used to repeat the program until the user says to end. Uses a while loop
rerun = 'Y'
while rerun.upper() == 'Y':
    print('This program can convert numbers from 1-999,999,999 to TEXT. \n'
          'The input is of type integer, you must not enter commas.')
    # Input for the User
    option = input('Would you like the program generate a random number? Y/N: ')
    if option.upper() == 'Y':
        userInput = str(random.randint(0, 999999999))
    else:
        userInput = input("Enter a number: ")

    # Gets the amount of numbers
    length = len(userInput)
    # Outputs the amount of digits
    print(f'It has {length} digits.')
    # message when the inputted number is too long
    if length > 9:
        print('Number is too long convert to words, please keep it to 9 digits only.')

    # for a 1 digit input
    def zero(numinput):
        x = numstringZero[int(numinput[-1])]
        return x

    # for a 1 digit input
    def ones(numinput):
        x = numstring[int(numinput[-1])]
        return x

    # for a 2 digit input
    def tens(numinput):
        if int(numinput[-2]) == 1:
            a = numstringOnes[int(numinput[-1])]
        elif int(numinput[-2]) == 0:
            a = numstring[int(numinput[-1])]
        else:
            a = numstringTens[int(numinput[-2])] + ' ' + ones(numinput)
        return a

    # for a 3 digit input
    def hundreds(numinput):
        b = numstring[int(numinput[-3])]
        if int(numinput[-3]) > 0:
            a = b + ' Hundred '
        else:
            a = b + ''
        return a + tens(numinput)

    # for a 4 digit input
    def thousands(numinput):
        x = numstring[int(numinput[-4])]
        if int(numinput[-4]) > 0:
            a = x + ' Thousand '
        else:
            if int(numinput[-5]) > 0:
                if int(numinput[-4]) > 0:
                    a = x + 'Thousand '
                else:
                    a = x + ' Thousand '
            else:
                if int(numinput[-0]) > 0:
                    if int(numinput[-6]) > 0:
                        a = x + 'Thousand '
                    else:
                        a = x + ''
                else:
                    a = x + ''
        return a + hundreds(numinput)

    # variation of the 4 digit input that takes into account inputted zeroes
    def thousandszero(numinput):
        if int(numinput[-4]) > 0:
            x = ' Thousand '
        else:
            if int(numinput[-5]) > 0:
                if int(numinput[-5]) == 1:
                    x = ' Thousand '
                else:
                    x = 'Thousand '
            else:
                x = ''
        return x + hundreds(numinput)

    # for a 5 digit input
    def tenthousands(numinput):
        if int(numinput[-5]) == 1:
            a = numstringOnes[int(numinput[-4])] + thousandszero(numinput)
        else:
            x = numstringTens[int(numinput[-5])]
            if int(numinput[-4]) == 0:
                y = ''
            else:
                y = ' '
            a = x + y + thousands(numinput)
        return a

    # for a 6 digit input
    def hundredthousands(numinput):
        x = numstring[int(numinput[-6])]
        if int(numinput[-6]) > 0:
            if int(numinput[-5]) > 0:
                y = ' Hundred '
            else:
                if int(numinput[-4]) > 0:
                    y = ' Hundred'
                else:
                    y = ' Hundred '
            a = x + y + tenthousands(numinput)
        else:
            a = x + tenthousands(numinput)
        return a

    # for a 7 digit input
    def million(numinput):
        x = numstring[int(numinput[-7])]
        y = ' Million '
        return x + y + hundredthousands(numinput)

    # for 8 digit input
    def tenmillion(numinput):
        if int(numinput[-8]) == 1:
            x = numstringOnes[int(numinput[-7])] + ' Million '
            a = x
        else:
            x = numstringTens[int(numinput[-8])]
            if int(numinput[-7]) > 0:
                y = ' ' + numstring[int(numinput[-7])] + ' Million '
                a = x + y
            else:
                y = ' Million '
                a = x + y
        return a + hundredthousands(numinput)

    # for a 9 digit input
    def hundredmillion(numinput):
        x = numstring[int(numinput[-9])]
        if int(numinput[-8]) > 0:
            y = ' Hundred '
        else:
            y = ' Hundred'
        return x + y + tenmillion(numinput)


    # Determines which variation of the outputtable digits it will use
    if length == 1:
        print(f'The number is {(str(userInput))}\n{zero(userInput)}')
    elif length == 2:
        print(f'The number is {(str(userInput))}\n{tens(userInput)}')
    elif length == 3:
        print(f'The number is {(str(userInput))}\n{hundreds(userInput)}')
    elif length == 4:
        print(f'The number is {(str(userInput))[0]},{(str(userInput))[1:4]} \n{thousands(userInput)}')
    elif length == 5:
        print(f'The number is {(str(userInput))[0:2]},{(str(userInput))[2:5]} \n{tenthousands(userInput)}')
    elif length == 6:
        print(f'The number is {(str(userInput))[0:3]},{(str(userInput))[3:6]} \n{hundredthousands(userInput)}')
    elif length == 7:
        print(f'The number is {(str(userInput))[0]},{(str(userInput))[1:4]},{(str(userInput))[4:7]}\n'
              f'{million(userInput)}')
    elif length == 8:
        print(f'The number is {(str(userInput))[0:2]},{(str(userInput))[2:5]},{(str(userInput))[5:8]}\n'
              f'{tenmillion(userInput)}')
    elif length == 9:
        print(f'The number is {(str(userInput))[0:3]},{(str(userInput))[3:6]},{(str(userInput))[6:9]}\n'
              f'{hundredmillion(userInput)}')
    rerun = input('Run again? ')