---
title: strings.joinStr() function
description: strings.joinStr() concatenates elements of a string array into a single string using a specified separator.
url: https://docs.influxdata.com/flux/v0/stdlib/strings/joinstr/
estimated_tokens: 575
product: Flux
version: v0
---

# strings.joinStr() function

-   Flux 0.18.0+
-   View InfluxDB support

`strings.joinStr()` concatenates elements of a string array into a single string using a specified separator.

##### Function type signature

```js
(arr: [string], v: string) => string
```

For more information, see [Function type signatures](/flux/v0/function-type-signatures/).

## Parameters

### arr

(Required) Array of strings to concatenate.

### v

(Required) Separator to use in the concatenated value.

## Examples

### Join a list of strings into a single string

```js
import "strings"

strings.joinStr(arr: ["foo", "bar", "baz", "quz"], v: ", ")// Returns "foo, bar, baz, quz"

```