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22 changes: 11 additions & 11 deletions 10. Shell 函数.md
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Original file line number Diff line number Diff line change
Expand Up @@ -27,9 +27,9 @@ echo "-----function start-----"
### 输出：
```
asa@asa-virtual-machine:~$ ./printf.sh
-----func start-----
This is my first shell func
-----func start-----
-----function start-----
This is my first shell function
-----function start-----
```
### 实例2（有return）：
```
Expand Down Expand Up @@ -57,7 +57,7 @@ Input the first num1:
1
Input the second num2:
5
Two nums are 1 and 5 !
Two nums are 1 and 5
num1 + num2 = 6
```
函数返回值在调用该函数后通过 $? 来获得。
Expand All @@ -84,12 +84,12 @@ funWithParam 1 2 3 4 5 6 7 8 9 34 73
### 输出：
```
asa@asa-virtual-machine:~$ ./printf.sh
first param is 1
second param is 2
tenth param is 10
tenth param is 34
eleventh param is 73
Total count is 11
The first param is 1
The second param is 2
The tenth param is 10
The tenth param is 34
The eleventh param is 73
Total count is 11
A string of all params is 1 2 3 4 5 6 7 8 9 34 73
```
### 注意:
Expand All @@ -104,4 +104,4 @@ $10 不能获取第十个参数，获取第十个参数需要${10}。当n>=10时
|$!| 后台运行的最后一个进程的ID号|
|$@| 与$*相同，但是使用时加引号，并在引号中返回每个参数。|
|$-| 显示Shell使用的当前选项，与set命令功能相同。|
|$?| 显示最后命令的退出状态。0表示没有错误，其他任何值表明有错误。|
|$?| 显示最后命令的退出状态。0表示没有错误，其他任何值表明有错误。|