def test_factorial():
"""
Test procedure for function factorial().
"""
print('Testing factorial()')
result = funcs.factorial(0)
introcs.assert_equals(1,result)
result = funcs.factorial(1)
introcs.assert_equals(1,result)
result = funcs.factorial(2)
introcs.assert_equals(2,result)
result = funcs.factorial(3)
introcs.assert_equals(6,result)
result = funcs.factorial(5)
introcs.assert_equals(120,result)
result = funcs.factorial(8)
introcs.assert_equals(40320,result)
def main():
return sum_digits(factorial(100))
def lattice_moves(n, m):
return factorial(n+m) // (factorial(n) * factorial(m))
from __future__ import division from sys import argv import funcs script, number = argv number = int(number) fact = funcs.factorial(number) print funcs.digitsum(fact)
