python 使用遞歸，完成傳入n，返回1! + 2! + 3! + ... + n!

def test(n): if n == 1: return 1 else: return n*test(n-1) n = int(input("請輸入一個整數：")) sum = 0 for i in range(1,n+1): sum = sum + test(i)

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