求1到5階乘之和

1 方法一： 2 s = 1 3 sum = 0 4 for i in range(1,6): 5 s = s*i 6 sum += s 7 print(s) 8 print(sum) 1 方法二：效率低，每次都要從新算k 2 3 n = 0 4 for i in range(1,6): 5 k = 1 6 for j in range(1, i + 1): 7

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