terraform/website/docs/language/functions/join.mdx

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---
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page_title: join - Functions - Configuration Language
description: |-
The join function produces a string by concatenating the elements of a list
with a given delimiter.
---
# `join` Function
`join` produces a string by concatenating together all elements of a given
list of strings with the given delimiter.
```hcl
join(separator, list)
```
## Examples
```
> join(", ", ["foo", "bar", "baz"])
foo, bar, baz
> join(", ", ["foo"])
foo
```
## Related Functions
2021-12-15 03:41:17 +01:00
* [`split`](/language/functions/split) performs the opposite operation: producing a list
by separating a single string using a given delimiter.