shell 编程arry数组

1.复制和取值

一起赋值
#!/bin/bash
arry_name=(xiaoming xiaoli dalong sanlang)
echo ${arry_name[0]}
echo ${arry_name[1]}
echo ${arry_name[2]}
echo ${arry_name[3]}
[[email protected] ~]# bash arry.sh
xiaoming
xiaoli
dalong
sanlang
[[email protected] ~]#

单独赋值
[[email protected] ~]# vim  arry02.sh
name[0]="xiaoming"
name[2]="xiaoli"
name[3]="lusa"
echo ${name[0]}
echo ${name[1]}
echo ${name[2]}
~ 
[[email protected] ~]# bash arry02.sh
xiaoming
 
xiaoli
[[email protected] ~]# name[0]="xiaoming"
[[email protected] ~]# echo ${name[0]}
xiaoming
[[email protected] ~]#

2.获取字符串的长度

[[email protected] ~]# name="oldboy"
[[email protected] ~]# echo ${#name}
6
[[email protected] ~]#

3.获取数组的长度

[[email protected] ~]# cat arry02.sh
name[0]="xiaoming"
name[2]="xiaoli"
name[3]="lusa"
echo ${name[0]}
echo ${name[1]}
echo ${name[2]}
echo ${#name[*]}
echo ${#name[@]}
[[email protected] ~]#
[[email protected] ~]# bash  arry02.sh
xiaoming
 
xiaoli
3
3

for循环取值

[[email protected] ~]# cat arr.sh
arry=(
10.0.0.1
10.0.0.2
10.0.0.3
10.0.0.4
)
for i in ${arry[*]}
do
 echo $i
done
[[email protected] ~]#
[[email protected] ~]# bash arr.sh
10.0.0.1
10.0.0.2
10.0.0.3
10.0.0.4

#!/bin/bash
arry=(
10.0.0.0
10.0.0.1
10.0.0.2
)
for((i=0;i<${#arry[*]};i++))
do
 echo ${arry[$i]}
done
~

取命令的值

命令结果放在数组里面：
arry=($(ls))
[[email protected] ~]# cat a.sh
#!/bin/bash
arry=($(ls))
for i in ${arry[*]}
do
 echo $i
done
[[email protected] ~]#

arry取值的反思：

1.直接去arry  ${arry[*]}

2.for循环获取长度，按照索引输出数组的值