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Python includes exercises 26

Python 100 Li Python 100 Li

Title: recursive method request 5 !.

Program analysis: recursive formula: fn = fn_1 * 4!

Source Code:

#!/usr/bin/python
# -*- coding: UTF-8 -*-

def fact(j):
    sum = 0
    if j == 0:
        sum = 1
    else:
        sum = j * fact(j - 1)
    return sum

for i in range(5):
    print '%d! = %d' % (i,fact(i))

The above example output is:

0! = 1
1! = 1
2! = 2
3! = 6
4! = 24

Python 100 Li Python 100 Li