在bash的while循环中有选择地追加字符串常量

#!/bin/bash

counter=1
while [ $counter -le 10 ]; do
    if [ $counter -lt 5 ]; then
        echo "追加的字符串常量A"
    else
        echo "追加的字符串常量B"
    fi
    counter=$((counter + 1))
done

#!/bin/bash

counter=1
while [ $counter -le 10 ]; do
    case $counter in
        [1-4])
            echo "追加的字符串常量A"
            ;;
        *)
            echo "追加的字符串常量B"
            ;;
    esac
    counter=$((counter + 1))
done