# TRIM\_CHARS

返回不带前导或尾随字符的给定字符串。

## 语法

```
TRIM_CHARS(characters, input)
```

## 参数

| 名称 | 类型 | 描述 | 默认值 |
| --- | --- | --- | --- |
| 字符 | 字符串 |  |  |
| 输入 | 字符串 |  |  |

## 返回

返回一个 `string` 值。

***

## 示例

| 字符 | 输入 | 输出 |
| --- | --- | --- |
| "-=" | "-==–你好世界—=—" | `Hello World` |
| "-" | “” | `` |
| "-" | "———–" | `` |
| "-" | "x———–" | `x` |
| "-" | "———–x" | `x` |
| "-" | "——x—–" | `x` |
| "-" | "x———–x" | `x-----------x` |