# Markdown 代码

如果是段落上的一个函数或片段的代码可以用反引号把它包起来（\`），例如：

```markdown
`printf()` 函数
```

显示结果如下：

`printf()` 函数

## 代码区块

代码区块使用 4 个空格或者一个制表符（Tab 键）。

```markdown
    <?php
    echo 'learn';
    function test() {
        echo 'test'
    }
```

显示结果如下：

```
<?php
echo 'learn';
function test() {
    echo 'test'
}
```

也可以用 \`\`\` 包裹一段代码，并指定一种语言（也可以不指定）：

````
```javascript
$(document).ready(function () {
    alert('learn');
});
```
````

显示结果如下：

```javascript
$(document).ready(function () {
    alert('learn');
});
```


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://lujw666.gitbook.io/learn/markdown/00-basic/06-dai-ma.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.