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Tutur33
67 lines
1.5 KiB
Python
67 lines
1.5 KiB
Python
# Ecrire une fonction qui retourne la factorielle d'un nombre entier N.
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# On rappelle que : N ! = 1×2×...×(N-1)×N
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# >>> print(factorielle(50))
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# 30414093201713378043612608166064768844377641568960512000000000000
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def factorielle(N):
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if N == 0:
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return 1
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else:
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return N * factorielle(N-1)
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while True:
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try:
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N = input("Entrez un nombre entier: ")
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N = int(N)
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break
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except ValueError:
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try:
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N = eval(N)
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N = int(N)
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break
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except:
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print("Oops! Ce n'était pas un nombre valide. Essayez encore...")
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print("factorielle(" + str(N) + ") =", factorielle(N))
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# Amélioration du script avec une interface graphique
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from tkinter import *
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def factorielle(N):
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if N == 0:
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return 1
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else:
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return N * factorielle(N-1)
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def factorielle2():
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N = entree.get()
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try:
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N = int(N)
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except ValueError:
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try:
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N = eval(N)
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N = int(N)
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except:
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N = "Oops! Ce n'était pas un nombre valide. Essayez encore..."
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sortie.configure(text = "factorielle(" + str(N) + ") = " + str(factorielle(N)))
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fenetre = Tk()
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fenetre.title("Calculatrice de factorielle")
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fenetre.geometry("300x100")
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entree = Entry(fenetre, width=30)
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entree.pack()
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bouton = Button(fenetre, text="Calculer", command=factorielle2)
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bouton.pack()
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sortie = Label(fenetre, text="")
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sortie.pack()
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fenetre.mainloop()
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# Comparez avec le résultat de la fonction factorial() du module math.
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from math import factorial
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print("factorial(" + str(N) + ") =", factorial(N)) |