先產生1-9 RANDBETWEEN(1,9) 這樣確保1-9機率一樣使用常數陣列,這類通常用於顯示星期(Mon,Tue....)或月份(Jan,Feb,Mar...)再搭配index函數即可,如:=INDEX({"Sun","Mon","Tue","Wed","Thu","Fri","Sat"},1) 可顯示Sun=INDEX({"Sun","Mon","Tue","Wed","Thu","Fri","Sat"},WEEKDAY(TODAY())) 今天星期英文所以=INDEX({1,2,3,5,6,7,8,9,10},RANDBETWEEN(1,9))就可以有要的結果了