求整數的階乘之和: s=1!+2!+3!+4!+...n!

求整數的階乘之和: s=1!+2!+3!+4!+...n!。python #!/usr/bin/python3 def factorial(num): fact = 1 sum = 0 if num < 0: print("負數沒有階乘！") elif num == 0: print("0的階乘爲1。") else: for i in range(1, num +1):

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