#作業3 ***判斷是否為7的倍數** ``` 1.程式碼: t=input('請輸入0~1000之間的數字') num= int(t) while num<0 or num > 1000 print ('try again') t= input('請輸入0~1000之間的數字') num= int(t) if num.isdigit(): print('正整數') if num % 7 == 0: print(num, '是7的倍數') else: print(num, '不是7的倍數') ``` 2. 執行結果: 
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