=JOIN(array, separator)
| Argument | Type | Description |
|---|
| array | Array | Array of elements to convert to a string |
| separator | String | String separator to use when combining elements |
=JOIN([1, 2, 3], "_")→"1_2_3"
=JOIN(["A", "B", "C"], "")→"ABC"
=JOIN([], ", "])→""
