篩選分數等級

#!/bin/bash
#篩選分數等級
score=500

if [ $score -gt 100 ];then
    echo "分數不正確"
elif [ $score -ge 80 ];then
    echo "優秀"
elif [ $score -ge 60 ];then
    echo "及格"
elif [ $score -ge 0 ];then
    echo "不及格"
else 
    echo "分數不正確"
fi