> For the complete documentation index, see [llms.txt](https://docs.tomat.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.tomat.ai/data-transformation/formulas/misc-functions/ismissing.md).

# IsMissing

Check if a value is empty or NULL

```
IsMissing("") → true
IsMissing(null) → true
```

#### Inputs

`IsMissing(value)`

* `value`- A value to check

#### Description

For String columns, we don’t distinguish between the null and empty string (””)