通过for循环打印5 4 3 2 1
[root@shnne ~]# cat for1.sh
#!/bin/sh
for i in 5 4 3 2 1
do
echo $i
done
[root@shnne ~]# cat for2.sh
#!/bin/sh
for i in {5..1}
do
echo $i
done
[root@shnne ~]# cat for3.sh
#!/bin/sh
for i in `seq 5 -1 1`
do
echo $i
done
[root@shnne ~]# cat for4.sh
#!/bin/sh
for((i=5; i>=1; i--))
do
echo $i
done