| --- |
| 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 all of the elements of the specified |
| list of strings with the specified separator. |
| |
| ```hcl |
| join(separator, list) |
| ``` |
| |
| ## Examples |
| |
| ``` |
| > join("-", ["foo", "bar", "baz"]) |
| "foo-bar-baz" |
| > join(", ", ["foo", "bar", "baz"]) |
| foo, bar, baz |
| > join(", ", ["foo"]) |
| foo |
| ``` |
| |
| ## Related Functions |
| |
| * [`split`](/terraform/language/functions/split) performs the opposite operation: producing a list |
| by separating a single string using a given delimiter. |
