bash脚本 while循环语句

[root@gfs-node122 shell]# cat Daemonwhile.sh
i=5
while [ $i -gt 0 ] 
do
    echo five $i
    (( i-- ))
done

i=9
 
while [ $i -le 12 ]
do
    echo nine $i

    (( i++ ))

done
 

[root@gfs-node122 shell]# bash Daemonwhile.sh
five 5
five 4
five 3
five 2
five 1
nine 9
nine 10
nine 11
nine 12