concat.md

---

aliases:
- ../../configuration-language/standard-library/concat/
title: 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

> 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]]