#!/bin/bash
str="a b --n d"
array=($str)
length=${#array[@]}
echo $length

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

#!/bin/bash
str="a b c"
for i in $str
do
echo $i
done
或者：
#!/bin/bash
str="a b c"
array=($str)
for ((i=0;i<${#array[@]};i++))
do
  echo ${array[$i]}
done

#!/bin/bash

str2="a#b#c"
a=($(echo $str2 | tr '#' ' ' | tr -s ' '))
length=${#a[@]}

for ((i=0; i<$length; i++))
do
echo ${a[$i]}
done
#echo ${a[2]}

#!/bin/bash
str="a b --n dd"
array=($str)
length=${#array[@]}

#ouput the first array element直接輸出的是數組的第一個元素
echo $array

#Use subscript way access array用下標的方式訪問數組元素
echo ${array[1]}

#Output the array輸出這個數組
echo ${array[@]}

#Output in the array subscript for 3 the length of the element輸出數組中下標為3的元素的長度
echo ${#array[3]}

#Output in the array subscript 1 to 3 element輸出數組中下標為1到3的元素
echo ${array[@]:1:3}

#Output in the array subscript greater than 2 elements輸出數組中下標大于2的元素
echo ${array[@]:2}

#Output in the array subscript less than 2 elements輸出數組中下標小于2的元素
echo ${array[@]::2}

#!/bin/bash
str="a --m"
for i in $str
do
echo $i
done

echo x$str | sed 's/^x//'
echo -ne "$str/n"
echo -e "$str/n/c"
printf "%s/n" $str（這樣也可以）