For循環在bash中多行字符串不反覆在每一行

Question

看看下面的示例腳本：

foo="multi 
line" 
bar="multi 
line" 
for X in $foo $bar 
do 
    echo $X 
    echo "break" 
done 

輸出將是：

multi 
break 
line 
break 
... 

我怎麼能遍歷整個變量，而不是每條線？所需的輸出將是：

multi 
line 
break 
multi 
line 
break 

道歉，因爲我敢肯定，這必須是一個重複的，但它無法搜索。

Answer 1

見Why does my shell script choke on whitespace or other special characters?

$ cat ip.sh 
#!/bin/bash 

foo="multi 
line" 
bar="multi 
line" 
for X in "$foo" "$bar" 
do 
    echo "$X" 
    echo "break" 
done 

$ ./ip.sh 
multi 
line 
break 
multi 
line 
break