shell中echo输入换行问题

xihai

在以下两个shell中

1. 
   
2. $pg forlist
   
3. #!/bin/sh
   
4. for loop in "orange red blue"
   
5. do
   
6.   echo "This is the fruit $loop"
   
7. done
   
8. 
   
9. $forlist
   
10. This is the fruit orange red blue
    
11. 
    

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1. 
   
2. $pg forparam
   
3. #打印参数
   
4. #!/bin/sh
   
5. for params
   
6. do
   
7.   echo "You supplied supplied $params as s command line option"
   
8. do
   
9. 
   
10. $forparam file1 file2 file3
    
11. You supplied supplied file1 as s command line option
    
12. You supplied supplied file2 as s command line option
    
13. You supplied supplied file3 as s command line option
    

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请问第一个例中了不是输出
This is the fruit orange
This is the fruit red
This is the fruit blue

xihai

为什么第二个例子是每个FOR就是一行，还有

for loop in `ls`
do
  echo $loop
done

输出的当前文件也是每行一个

huan

1. 
   
2. [0 No.1999 huan@huan ~ ]$ for loop in "o r b"; do echo $loop; done
   
3. o r b
   
4. 
   
5. [0 No.2000 huan@huan ~ ]$ for loop in o r b; do echo $loop; done
   
6. o
   
7. r
   
8. b
   
9. 
   

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xihai

晕，这么回事，我一直想到的是for loop in "o r b"中loop  是三个量orb,那它应该是直接是"o r b",要是

1. 
   
2. $for loop in "or" "b";do echo $loop;done
   
3. $or
   
4. $b
   

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对不