# CONCAT\_OF\_ANY

### Description

`CONCAT_OF_ANY` is the flexible counterpart of [`CONCAT`](https://docs.atfinity.io/rule-language/operators/string-operators/concat).

It combines multiple lists into a single piece of text if these values exist.

### Example

```
p is Person
CONCAT_OF_ANY(
    '+',
    TRIM_LEFT(p.phone_country_code, '0'),
    TRIM_LEFT(p.phone_number, '0')
)
```

This only combines the nationality with the optional second nationality if there is a second nationality provided.\ <br>