求1+2!+3!+4!...+20!的和
n = 0
s = 0
t = 1
for n in range(1,21):
t *= n
s += t
print('1+2!+3!+4!...+20!的和= %d'%s)
练习题:求和
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2022-01-21
求1+2!+3!+4!...+20!的和
n = 0
s = 0
t = 1
for n in range(1,21):
t *= n
s += t
print('1+2!+3!+4!...+20!的和= %d'%s)
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