# 作業三 判斷7的倍數 ```python= while True: #用無窮迴圈判斷,需要時跳出 number = input("請輸入一個0到1000的整數") #輸入 if number.isdigit() == True: #判斷是否由數字組成 if int(number) >= 0 and int(number) <= 1000: #判斷數字是否在範圍內 break #成立離開迴圈 compute = int(number) % 7 #求餘數 if compute == 0: #餘數為零則為倍數 print(str(number),'為7的倍數') else: print(str(number),'不是7的倍數,餘數為',str(compute)) ``` 
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