Pfthb

I have an issue when trying to convert numbers to words: it crashes when I enter 80, or if i enter 100 it produces "one hundred two hundred". Can someone help me fix my code.

number = input("Enter a value: ")
ones = ["", "one ", "two ","three ", "four", "five ", "six ", "seven ", 
"eight ", "nine "]
teens = ["ten ", "eleven ", "twelve ", "thirteen ", "fourteen ", "fifteen ", 
"sixteen ", "seventeen ", "eighteen ", "nineteen "]
decades = ["", "twenty ", "thirty ", "forty ", "fifty ", "sixty ", "seventy 
", "eighty ", "ninety "]
hundreds = ["", "one hundred ", "two hundred ", "three hundred ", "four 
hundred ", "five hundred", "six hundred ", "seven hundred", "eight hundred", 
"nine hundred"]

word = ""
change = len(number)

while change > 0:
 if number == "0":
 word ="zero"
 break
 elif change > 1 and number[change - 2] == "1":
 for i in range(0,10):
 if number[change - 1] == str(i):
 word = teens[i] + word
 else:
 for i in range(0,10):
 if number[change - 1] == str(i):
 word = ones[i] + word
 if change > 1:
 for i in range(0,10):
 if number[change - 2] == str(i):
 word = decades[i] + word
 if change > 2:
 for i in range(0,10):
 if number[change - 3] == str(i):
 word = hundreds[i] + word
 change = change - 3
print(word)

This should work: word2number

And an example from their docs:
print(w2n.word_to_num('one hundred thirty-five'))

Just this if statements will work (note that's all you need to make it work):

if len(number)==1:
 print(ones[int(number)])
elif len(number)==2 and number[0]=='1':
 print(teens[int(number[-1])])
elif len(number)==2 and number[0]!='1':
 print(decades[int(number[0])-1])
elif len(number)==3:
 print(hundreds[int(number[0])])

Note that have to add commas in decades and hundreds, so copy the below, then replace with the clipboard:

decades = ["", "twenty ", "thirty ", "forty ", "fifty ", "sixty ", "seventy", "eighty ", "ninety "]
hundreds = ["", "one hundred ", "two hundred ", "three hundred ", "four hundred ", "five hundred", "six hundred ", "seven hundred", "eight hundred", 

You have missed a comma between "seventy" and "eighty" in decades. You have to change decades to the following:

decades = ["", "twenty ", "thirty ", "forty ", "fifty ", "sixty ", "seventy", "eighty ", "ninety"]

The same mistake is there in hunderds list as well. Use this new list:

hundreds = ["", "one hundred ", "two hundred ", "three hundred ", "four hundred ", "five hundred", "six hundred ", "seven hundred", "eight hundred", "nine hundred"]

Nevertheless, your implementation has lot of mistakes.

I think that for making your example working you just need to make sure that each change digit is accessing the correct value in your lists. That's not the case for your decades lists, where you missed a blank string for the teens, that you're correctly treating as a separate case.

So to make your code work just change:

decades = ["", "twenty ", "thirty ", "forty ", "fifty ", "sixty ", "seventy", "eighty ", "ninety "]

to this:

decades = ["", "", "twenty ", "thirty ", "forty ", "fifty ", "sixty ", "seventy", "eighty ", "ninety "]

For this implementation, you should always have 10 elements in the lists. For example, in decades you should have some string representing the values between 10-20 even if its not used because the indexing of the array would be wrong otherwise.

Still this code has a lot of mistakes.
Try this.

number = input("Enter a value: ")
ones = ["", "one ", "two ","three ", "four", "five ", "six ", "seven ", "eight ", "nine "]
teens = ["ten ", "eleven ", "twelve ", "thirteen ", "fourteen ", "fifteen ", "sixteen ", "seventeen ", "eighteen ", "nineteen "]
decades = ["", "onety", "twenty ", "thirty ", "forty ", "fifty ", "sixty ", "seventy ", "eighty ", "ninety "]
hundreds = ["", "one hundred ", "two hundred ", "three hundred ", "four hundred ", "five hundred", "six hundred ", "seven hundred", "eight hundred", "nine hundred"]

word = ""
change = len(number)

while change > 0:
 if number == "0":
 word ="zero"
 break
 elif change > 1 and number[change - 2] == "1":
 for i in range(0,10):
 if number[change - 1] == str(i):
 word = teens[i] + word
 if change == 2:
 break
 else:
 for i in range(0,10):
 if number[change - 1] == str(i):
 word = ones[i] + word
 if change > 1 and number[change-2]!="1":
 for i in range(0,10):
 if number[change - 2] == str(i):
 word = decades[i] + word
 if change > 2:
 for i in range(0,10):
 if number[change - 3] == str(i):
 word = hundreds[i] + word
 change = change - 3
print(word)