---
metadata:
  - name: generator
    content: Diplodoc Platform v5.63.0
alternate:
  - en/function-ref/LN
  - ru/function-ref/LN
  - href: en/function-ref/LN.md
    type: text/markdown
    title: Markdown version
csp:
  - script-src:
      - https://mc.yandex.ru
    img-src:
      - https://mc.yandex.ru
    connect-src:
      - https://mc.yandex.ru
      - wss://mc.yandex.ru
    child-src:
      - 'blob:'
      - https://mc.yandex.ru
    frame-src:
      - 'blob:'
      - https://mc.yandex.ru
    frame-ancestors:
      - 'blob:'
      - https://mc.yandex.ru
canonical: en/function-ref/LN.html
editable: false
vcsPath: en/function-ref/LN.md
---

# LN



#### Syntax {#syntax}


```
LN( number )
```

#### Description {#description}
Returns the natural logarithm of the number `number`. Returns `NULL` if the number is less than or equal to 0.

**Argument types:**
- `number` — `Fractional number | Integer`


**Return type**: `Fractional number`

#### Examples {#examples}

```
LN(1) = 0.0
```

```
LN(EXP(2)) = 2.0
```


#### Data source support {#data-source-support}

`ClickHouse 21.8`, `Files`, `Google Sheets`, `Microsoft SQL Server 2017 (14.0)`, `MySQL 5.7`, `Oracle Database 12c (12.1)`, `PostgreSQL 9.3`, `Trino`, `Yandex Documents`, `YDB`.