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36 lines
846 B
Python
Executable File
36 lines
846 B
Python
Executable File
#!/usr/bin/env python
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"""
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##---
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# jlengrand
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#Created on : Fri Jan 13 15:41:12 CET 2012
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#
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# DESCRIPTION : Solves problem 20 of Project Euler
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n! means n (n 1) ... 3 2 1
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For example, 10! = 10 9 ... 3 2 1 = 3628800,
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and the sum of the digits in the number 10! is 3 + 6 + 2 + 8 + 8 + 0 + 0 = 27.
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Find the sum of the digits in the number 100!
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##---
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"""
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def sum_fact(value):
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"""
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Returns the sum of digits in value!
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"""
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return sum_digits(fact(value))
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def fact(value):
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"""
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Returns value!
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"""
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if value == 0:
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return 1
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return value * fact(value - 1)
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def sum_digits(value):
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"""
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Returns the value of the sum of the digits of value
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"""
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return sum([int(el) for el in list(str(value))])
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if __name__ == '__main__':
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print "Answer : %d" % (sum_fact(100))
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