def factoriel
:
if(n==0 or n==1):
return 1
else:
return n * factoriel(n-1)
try:
k=1
while(k==1):
a=int(raw_input("Bir sayi giriniz: "))
if(a>0):
k=0
print factoriel(a)
except:
print "Harf girmeyiniz"
:if(n==0 or n==1):
return 1
else:
return n * factoriel(n-1)
try:
k=1
while(k==1):
a=int(raw_input("Bir sayi giriniz: "))
if(a>0):
k=0
print factoriel(a)
except:
print "Harf girmeyiniz"
