Python factorial示例

示例#1

文件： 015.py 项目： toastdriven/euler

from useful_euler import factorial
side_length = 20
print "Side Length %s has %s paths." % (side_length, factorial(side_length * 2) / (factorial(side_length) ** 2))

示例#2

文件： 020.py 项目： toastdriven/euler

#!/usr/bin/env python
from useful_euler import factorial
# starting_number = 6
starting_number = 100
print sum(int(i) for i in str(factorial(starting_number)))