case判断
• 格式 case 变量名 in
value1)
command
;;
value2)
command
;;
*)
commond
;;
esac
• 在case程序中，可以在条件中使用|，表示或的意思， 比如
|)
command
;; shell脚本案例 #!/bin/bash
read -p "Please input a number: " n
if [ -z "$n" ]
then
echo "Please input a number."
exit
fi
n1=`echo $n|sed 's/[0-9]//g'`
if [ -n "$n1" ]
then
echo "Please input a number."
exit
fi
if [ $n -lt ] && [ $n -ge ]
then
tag=
elif [ $n -ge ] && [ $n -lt ]
then
tag=
elif [ $n -ge ] && [ $n -lt ]
then
tag=
elif [ $n -ge ] && [ $n -le ]
then
tag=
else
tag=
fi case $tag in
)
echo "not ok"
;;
)
echo "ok"
;;
)
echo "ook"
;;
)
echo "oook"
;;
*)
echo "The number range is 0-100."
;;
esac 讲解
输入一个数字 read -p "please input a number" n
-ge (greater equeal大于等于)
-le (less than equal小于等于)