相关疑难解决方法(0)

以下所有这些选项都可用于设置i计数.

count=5

for (( i=count; i>=0; i-- )); do 
    echo "$i"
done

for (( i=$count; i>=0; i-- )); do 
    echo "$i"
done

for (( i=$((count)); i>=0; i-- )); do 
    echo "$i"
done

for (( i=${count}; i>=0; i-- )); do 
    echo "$i"
done

哪个是正确的还是首选的？