---
title: strings.joinStr() function
description: >
  `strings.joinStr()` concatenates elements of a string array into a single string using a specified separator.
menu:
  flux_v0_ref:
    name: strings.joinStr
    parent: strings
    identifier: strings/joinStr
weight: 101
---

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`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
```

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

## Parameters

### arr
({{< req >}})
Array of strings to concatenate.



### v
({{< req >}})
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"


```