---
title: "concat | Grafana Agent documentation"
description: "Learn about concat"
---

# concat

The `concat` function concatenates one or more lists of values into a single list. Each argument to `concat` must be a list value. Elements within the list can be any type.

## Examples

![Copy code to clipboard](/media/images/icons/icon-copy-small-2.svg) Copy

```none
> concat([])
[]

> concat([1, 2], [3, 4])
[1, 2, 3, 4]

> concat([1, 2], [], [bool, null])
[1, 2, bool, null]

> concat([[1, 2], [3, 4]], [[5, 6]])
[[1, 2], [3, 4], [5, 6]]
```