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 | import os
 
list1 = ["", "un", "deux", "trois", "quatre", "cinq", "six", "sept", "huit", "neuf"]
list2 = ["dix", "onze", "douze", "treize", "quatorze", "quinze", "seize", "dix sept", "dix huit", "dix neuf"]
list3 = ["", "dix", "vingt", "trente", "quarante", "cinquante", "soixante", "soixante", "quatre vingt", "quatre vingt"]
list4 = ["mille", "million", "milliard"]
 
nb = 0
 
def convNbToLetter(nb):
 
	conv = ''
	i = True
	while i :
		nb = int(input("choisissez un nb : "))
		if nb != 0:
			millier = nb //1000
			centaine = (nb - millier * 1000)//100
			dizaine = (nb -millier * 1000 - centaine * 100) // 10
			unite = nb - millier*1000 - centaine*100- dizaine*10
 
			if millier == 1 : conv += list4[0]
			elif millier in [2,3,4,5,6,7,8,9]: conv += list1[millier] + " " + list4[0]
 
			if centaine == 1: conv += " cent"
			elif centaine != 0: 
				conv += " " + list1[centaine] + " cent"
				if dizaine == 0 and unite == 0: conv+="s"
			if dizaine not in [0,1]:
				conv += " " + list3[dizaine]
			if unite == 0:
				if dizaine in [1, 7, 9]: conv += " dix"
				elif dizaine == 8: conv+="s"
			elif unite == 1:
				if dizaine in [1, 9]: conv += " " + list2[unite]
				elif dizaine == 7: conv += " et onze"
				elif dizaine in [2, 3, 4, 5, 6]: conv += " et un"
				elif dizaine in [0, 8]: conv += " " + list1[unite]
			elif unite in [2, 3, 4, 5, 6, 7, 8, 9]:
				if dizaine in [1, 7, 9]: conv += " " + list2[unite]
				else: conv += " " + list1[unite]
 
 
		print("Votre nombre s'écrit :", conv.replace(" ", "-").strip("-").capitalize() + ".")
		boucle = input("Voulez-vous convertir un autre nombre ? Tapez 'O' pour oui et 'N' pour non : ")
		if boucle == "O": 
			conv = ""
			continue
		else : i = False
 
convNbToLetter(nb)
 
os.system("pause") | 
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