[問題] if的條件判斷？
使用if else
要如何寫輸入數值1~9才會執行，
輸入低於1或高於9，執行else？
我本來這樣
if( i>=1, i<=9 , j>=1 , j<=9)
.....省略
這樣寫，輸入小於1的數字會正常執行else，
不過輸入超過9，卻不會執行else，
要如何改？
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