def Dvofakt(n)
dvofakt = 1
for i in range(n)
i=i+1
if i%2==0:
dvofakt = dvofakt * i
return (dvofakt)
a = int(input("Unesi broj za dvofaktorijel: ")
Dvofakt(a)
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Traceback (most recent call last):
File "<string>", line 1, in <module>
File "/usr/lib/python2.7/py_compile.py", line 117, in compile
raise py_exc
py_compile.PyCompileError: File "prog.py", line 1
def Dvofakt(n)
^
SyntaxError: invalid syntax