shell之数组的使用

Posted 2020-10-03

数组 Array 

一段连续的内存空间 

1) 定义数组 

[[email protected] shell]# aa[0]=martin

[[email protected] shell]# aa[1]=jerry

[[email protected] shell]# aa[2]=mike

[[email protected] shell]# aa[10]=alice

[[email protected] shell]# bb=(192.168.1.1 192.168.1.2 192.168.1.3 192.168.1.4)

2) 调用数组的值  

[[email protected] shell]# echo ${bb[2]}

192.168.1.3

[[email protected] shell]# echo ${bb[1]}

192.168.1.2

[[email protected] shell]# echo ${bb[*]}

192.168.1.1 192.168.1.2 192.168.1.3 192.168.1.4

[[email protected] shell]# echo ${bb[@]}

192.168.1.1 192.168.1.2 192.168.1.3 192.168.1.4

3) 获取数组的长度 

[[email protected] shell]# echo ${#bb[*]}

4

[[email protected] shell]# echo ${#bb[@]}

4

编写脚本，找出数组中的最大数 

#!/bin/bash

#

aa=(14 543 64 235 76 345 765)

max=${aa[0]}

for i in `seq 6`; do

   if [ $max -lt ${aa[$i]} ]; then

     max=${aa[$i]}

   fi

done

echo $max

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