> For the complete documentation index, see [llms.txt](https://docs.mtoolstec.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.mtoolstec.com/cn/mtools-app/help-or-add-expression.md).

# 运算与表达式

## 可用运算符

|    Name    | Operator                                     | Example   |
| :--------: | -------------------------------------------- | --------- |
|   + - × ÷  | + - \* /                                     |           |
|   modulo   | #                                            |           |
|  brackets  | ( )                                          |           |
|     and    | @&                                           |           |
|     or     | @\|                                          |           |
|     xor    | @^                                           | b0 xor b1 |
|     not    | @\~                                          | not b3    |
|    连续求和    | b1+b2+···+b14                                | sum(1:14) |
|    连续异或    | b1 xor b2 xor ··· xor b10                    | sum(1:10) |
|    连续逻辑与   | b1 and b2 and ··· and b14                    | and(1:14) |
| CRC8/CRC16 | [了解更多](/cn/mtools-app/ji-suan-crc8-crc16.md) |           |

## 示例

| Rule              | Expression       |
| ----------------- | ---------------- |
| `b2 = b1`         | `b2=b1`          |
| `b4 = b2 + 0x1F`  | `b4 = b2 + 31`   |
| `b15 = b0 xor b1` | `b15 = b0 @^ b1` |
| `b2= not b0`      | b2 = @\~b0       |

* *请将十六进制数转化成十进制*
* *上下拖动表达式有改变计算顺序*
* *运算顺序为自上向下*

## 扩展用法

访问 [mXparser](http://mathparser.org/?s=Bitwise) 网站