Python - Number to Words

Program to convert Number to Words:

I am trying to teach Python to one of my old friend, and has given an assignment to convert numbers to words. So I tried doing it myself and It turned out to be fun.

I have used dictionary and recursive function :)

Code is readable so you may use logic in any language.

digitdict = {

  "0": "",

  "1": "One",

  "2": "Two",

  "3": "Three",

  "4": "Four",

  "5": "Five",

  "6": "Six",

  "7": "Seven",

  "8": "Eight",

  "9": "Nine",

}

tensdict = {

  "0": "",

  "1": "",

  "2": "Twety",

  "3": "Thirty",

  "4": "Fourty",

  "5": "Fifty",

  "6": "Sixty",

  "7": "Seventy",

  "8": "Eighty",

  "9": "Ninty",

}

exceptiondict = {

  "10": "Ten",

  "11": "Eleven",

  "12": "Twelve",

  "13": "Thirteen",

  "14": "Fourteen",

  "15": "Fifteen",

  "16": "Sixteen",

  "17": "Seventeen",

  "18": "Eighteen",

  "19": "Ninteen",

  "100": "Hundred",

}

def num2words(mydigit):

    wordstring = ""

    if mydigit in exceptiondict:

        return exceptiondict[mydigit]

    if len(mydigit) == 1:

        wordstring = digitdict[mydigit]

    if len(mydigit) == 2:

        wordstring = tensdict[mydigit[0]]

        wordstring = wordstring + " " + digitdict[mydigit[1]]

    if len(mydigit) == 3:

        if int(mydigit) > 99:

            wordstring = digitdict[mydigit[0]] + wordstring + " Hundred " + num2words(mydigit[1:])

        else:

            wordstring = num2words(mydigit[1:])

    if len(mydigit) == 4:

        wordstring = digitdict[mydigit[0]] + " Thousand " + num2words(mydigit[1:])

    if len(mydigit) == 5:

        wordstring = num2words(mydigit[0:2]) + " Thousand " + num2words(mydigit[2:5])

    if len(mydigit) == 6:

        wordstring = num2words(mydigit[0:3]) + " Thousand " + num2words(mydigit[3:6])

    if len(mydigit) > 6:

        wordstring = "you are a millionnaire, give me some..."

    return wordstring

#prompt = "type a number:"

#mydigit = input(prompt)

#print(num2words(mydigit))

while 1 == 1:

    prompt = "Type a number(0 to quit):"

    mydigit = input(prompt.strip())

    if mydigit.isnumeric():

        if int(mydigit) == 0:

            print("Bye")

            exit(0)

        else:

            print(num2words(mydigit))

    else:

        print("not a number...")

#for i in range (21341,21400,1):

#    print(num2words(str(i)))