Shell Programming--case judgment

Case Base Syntax:
Format case?? Variable name in
value1)
Command
;;
value2)
Command
;;
*)
Commond
;;
Esac
In a case program, you can use the |, meaning, or means of a condition, such as???
2|3)
Command
;;
Script

[[email protected] shell]# vim case.sh #!/bin/bashread -p "Please input a number: " nif [ -z "$n" ]then    echo "Please input a number."    exit 1fin1=`echo $n|sed ‘s/[0-9]//g‘`if [ -n "$n1" ]then echo "Please input a number." exit 1fiif [ $n -lt 60 ] && [ $n -ge 0 ]then    tag=1elif [ $n -ge 60 ] && [ $n -lt 80 ]then    tag=2elif [ $n -ge 80 ]  && [ $n -lt 90 ]then    tag=3elif [ $n -ge 90 ] && [ $n -le 100 ]then    tag=4else    tag=0ficase $tag in    1)        echo "不及格"        ;;    2)        echo "及格"        ;;    3)        echo "优秀"        ;;    4)        echo "非常优秀"        ;;    *)        echo "The number range is 0-100."        ;;esac

Execution results

[[email protected] shell]# sh case.shPlease input a number: 50不及格[[email protected] shell]# sh case.shPlease input a number: 60及格[[email protected] shell]# sh case.shPlease input a number: 80优秀[[email protected] shell]# sh case.shPlease input a number: 90非常优秀[[email protected] shell]# sh case.shPlease input a number: 116The number range is 0-100.[[email protected] shell]# sh case.shPlease input a number: aaaPlease input a number.

Shell Programming--case judgment