> For the complete documentation index, see [llms.txt](https://boxlang.ortusbooks.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/list/listlen.md).

# ListLen

Calculates the length of a list separated by the specified delimiter

## Method Signature

```
ListLen(list=[string], delimiter=[string], includeEmptyFields=[boolean], multiCharacterDelimiter=[boolean])
```

### Arguments

| Argument                  | Type      | Required | Description                                                    | Default |
| ------------------------- | --------- | -------- | -------------------------------------------------------------- | ------- |
| `list`                    | `string`  | `true`   | string list to calculate the length                            |         |
| `delimiter`               | `string`  | `false`  | string the list delimiter                                      | `,`     |
| `includeEmptyFields`      | `boolean` | `false`  | boolean whether to include empty fields in the returned result | `false` |
| `multiCharacterDelimiter` | `boolean` | `false`  |                                                                | `false` |

## Examples

### Simple listLen Example

Get the number of elements in this list

[Run Example](https://try.boxlang.io/?code=eJzLySwu8UnN01BQSsvP10lKLAJhIx0gx0hJQdOaCwCyzQnQ)

```java
listLen( "foo,bar,bar2,foo2" );

```

Result: 4

### listLen Example with Delimiter

Get the number of elements in this list using a custom delimiter

[Run Example](https://try.boxlang.io/?code=eJzLySwu8UnN01BQSsvP10lKLKoBYqMaIMdISUdBqUZJQdOaCwDzEwt8)

```java
listLen( "foo,bar|bar2|foo2", "|" );

```

Result: 3

### listLen Example with IncludeEmptyValues

Get the number of elements in this list, including empty values

[Run Example](https://try.boxlang.io/?code=eJzLySwu8UnN01BQSsvP10lKLNLRATKMlHQUlHRARKRrsJKCpjUXAPzbCqY%3D)

```java
listLen( "foo,bar,,foo2", ",", "YES" );

```

Result: 4

### Additional Examples

[Run Example](https://try.boxlang.io/?code=eJwrL8osSXUpzS3QUMjJLC7xSc3TUFAqLi3O1ClOzNXxcQzWKUktLlFS0FTQtFbQ11cw4SrHqQOsXAehtjyzJEMhNbegpFKhLDGnNLWYoF49iGYukG5jLgApey7b)

```java
writeDump( listLen( "susi,sam,LAS,test" ) ); // 4
writeDump( listLen( "susi,,LAS,," ) ); // with empty values
writeDump( listLen( "susi,,LAS,,." ) );
 // 3

```

## Related

* [GetToken](/boxlang-language/reference/built-in-functions/list/gettoken.md)
* [ListAppend](/boxlang-language/reference/built-in-functions/list/listappend.md)
* [ListAvg](/boxlang-language/reference/built-in-functions/list/listavg.md)
* [ListChangeDelims](/boxlang-language/reference/built-in-functions/list/listchangedelims.md)
* [ListCompact](/boxlang-language/reference/built-in-functions/list/listcompact.md)
* [ListContains](/boxlang-language/reference/built-in-functions/list/listcontains.md)
* [ListContainsNoCase](/boxlang-language/reference/built-in-functions/list/listcontainsnocase.md)
* [ListDeleteAt](/boxlang-language/reference/built-in-functions/list/listdeleteat.md)
* [ListEach](/boxlang-language/reference/built-in-functions/list/listeach.md)
* [ListEvery](/boxlang-language/reference/built-in-functions/list/listevery.md)
* [ListFilter](/boxlang-language/reference/built-in-functions/list/listfilter.md)
* [ListFind](/boxlang-language/reference/built-in-functions/list/listfind.md)
* [ListFindNoCase](/boxlang-language/reference/built-in-functions/list/listfindnocase.md)
* [ListFirst](/boxlang-language/reference/built-in-functions/list/listfirst.md)
* [ListGetAt](/boxlang-language/reference/built-in-functions/list/listgetat.md)
* [ListGetEndings](/boxlang-language/reference/built-in-functions/list/listgetendings.md)
* [ListIndexExists](/boxlang-language/reference/built-in-functions/list/listindexexists.md)
* [ListInsertAt](/boxlang-language/reference/built-in-functions/list/listinsertat.md)
* [ListItemTrim](/boxlang-language/reference/built-in-functions/list/listitemtrim.md)
* [ListLast](/boxlang-language/reference/built-in-functions/list/listlast.md)
* [ListMap](/boxlang-language/reference/built-in-functions/list/listmap.md)
* [ListNone](/boxlang-language/reference/built-in-functions/list/listnone.md)
* [ListPrepend](/boxlang-language/reference/built-in-functions/list/listprepend.md)
* [ListQualify](/boxlang-language/reference/built-in-functions/list/listqualify.md)
* [ListReduceRight](/boxlang-language/reference/built-in-functions/list/listreduceright.md)
* [ListRemoveDuplicates](/boxlang-language/reference/built-in-functions/list/listremoveduplicates.md)
* [ListRest](/boxlang-language/reference/built-in-functions/list/listrest.md)
* [ListSetAt](/boxlang-language/reference/built-in-functions/list/listsetat.md)
* [ListSome](/boxlang-language/reference/built-in-functions/list/listsome.md)
* [ListSort](/boxlang-language/reference/built-in-functions/list/listsort.md)
* [ListToArray](/boxlang-language/reference/built-in-functions/list/listtoarray.md)
* [ListTrim](/boxlang-language/reference/built-in-functions/list/listtrim.md)
* [ListValueCount](/boxlang-language/reference/built-in-functions/list/listvaluecount.md)
* [ListValueCountNoCase](/boxlang-language/reference/built-in-functions/list/listvaluecountnocase.md)


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