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PS3="Please input a number:"
select MENU in lamian huimian gaifan jiaozi baozi quit;do
       case $REPLY in
       1|2)
               echo "The price is 15Ôª"
               ;;
       3|5)
               echo "The price is 20Ôª"
               ;;
       4)
               echo "The price is 25Ôª"
       ;;
       6)
               echo "bye"
               break
               ;;
       *)
               echo "Input false"
       esac
done