shell--数组的定义/访问/赋值/遍历

#!/bin/bash
# 数组

# 数组的定义
a=(0 1 2 3)
# 数组元素的访问
echo "a[0]:${a[0]}"
# 数组的长度
echo "length:${#a[*]}"
# 所有元素
echo "all element:${a[*]}"
# 删除某个元素
unset a[1]
echo "after unset:${a[*]}"

echo "用for in 遍历"
for every in ${a[*]}
do
    echo "every:$every"
done


echo "用for(())遍历"
for ((i=0;i<=5;i++))
do
    array[$i]=0
done

for ((i=0;i<${#array[*]};i++))
do
    echo ${array[$i]}
done

输出:

a[0]:0
length:4
all element:0 1 2 3
after unset:0 2 3
用for in 遍历
every:0
every:2
every:3
用for(())遍历
0
0
0
0
0
0