shell select用法示例

1.示例代码如下

#!/bin/bash

declare -a serial
serial=(1 2 3 4)
PS3="Enter a number: "

select var in "a" "b" "c" "d"
do
    if ! echo ${serial[@]} | grep -q $REPLY; then
        echo "please enter [1-4]."
        continue
    fi
    echo "your anwser is: $var"
    break
done
#!/bin/bash

declare -a serial
se