Answer to Question #201369 in Python for praveen

Question

Number to English Words

Write a program to convert a non-negative integer

N to its English words representation.Input

The input will be a single line containing an integer

N. Note: The input number will not be greater than 10¹⁰.OutputN. Note: Don't use any libraries function tools

The output should be a single line containing the representation of the English words of number

N. See the sample input and output for the English words of numbers in places.Explanation

For example, if the given number is 123, your code should print the English words representation, which is

One Hundred Twenty Three

Sample Input 1

123

Sample Output 1

One Hundred Twenty Three

Sample Input 2

10005

Sample Output 2

Ten Thousand Five

Sample Input 3

1234567891

Sample Output 3

One Billion Two Hundred Thirty Four Million Five Hundred Sixty Seven Thousand Eight Hundred Ninety One

Answer 1

def num_to_words(n:int, w:dict):
	s = ''
	if n > 99:
		s += w[n//100] + w[100]
		n = n % 100
	if n > 20:
		s += w[n//10*10]
		n = n % 10
		if n > 0:
			s += w[n]
	else:
		s += w[n]
	return s


def num_to_words2(n:int, w:dict):
	s = ''
	if n > 999:
		p = 101
		while n > 0:
			if n%1000 != 0:
				s = num_to_words(n%1000,w) + w[p] + s
			n = n // 1000
			p += 1
	else:
		s += num_to_words(n,w)
	if len(s) == 0:
		return 'Zero'
	else:
		return s






words = {
	0:'',
	1:'One ',
	2:'Two ',
	3:'Three ',
	4:'Four ',
	5:'Five ',
	6:'Six ',
	7:'Seven ',
	8:'Eight ',
	9:'Nine ',
	10:'Ten ',
	11:'Eleven ',
	12:'Twelve ',
	13:'Thirteen ',
	14:'Fourteen ',
	15:'Fifteen ',
	16:'Sixteen ',
	17:'Seventeen ',
	18:'Eighteen ',
	19:'Nineteen ',
	20:'Twenty ',
	30:'Thirty ',
	40:'Forty ',
	50:'Fifty ',
	60:'Sixty ',
	70:'Seventy ',
	80:'Eighty ',
	90:'Ninety ',
	100:'Hundred ',
	101:'',
	102:'Thousend ',
	103:'Million ',
	104:'Billion '
}


while True:
	try:
		n = int(input())
	except ValueError:
		continue


	print(num_to_words2(n, words))