# LLEN

```json metadata
{
  "title": "LLEN",
  "description": "Returns the length of a list.",
  "categories": ["docs","develop","stack","oss","rs","rc","oss","kubernetes","clients"],
  "arguments": [{"display_text":"key","key_spec_index":0,"name":"key","type":"key"}],
  "syntax_fmt": "LLEN key",
  "complexity": "O(1)",
  "group": "list",
  "command_flags": ["readonly","fast"],
  "acl_categories": ["@read","@list","@fast"],
  "since": "1.0.0",
  "arity": 2,
  "key_specs": [{"RO":true,"begin_search":{"spec":{"index":1},"type":"index"},"find_keys":{"spec":{"keystep":1,"lastkey":0,"limit":0},"type":"range"}}],
  "tableOfContents": {"sections":[{"id":"examples","title":"Examples"},{"id":"redis-enterprise-and-redis-cloud-compatibility","title":"Redis Enterprise and Redis Cloud compatibility"},{"id":"return-information","title":"Return information"}]}
}
```













Returns the length of the list stored at `key`.
If `key` does not exist, it is interpreted as an empty list and `0` is returned.
An error is returned when the value stored at `key` is not a list.

## Examples


redis> LPUSH mylist "World"
(integer) 1
redis> LPUSH mylist "Hello"
(integer) 2
redis> LLEN mylist
(integer) 2


Give these commands a try in the interactive console:


LPUSH mylist "World"
LPUSH mylist "Hello"
LLEN mylist


## Redis Enterprise and Redis Cloud compatibility

| Redis<br />Enterprise | Redis<br />Cloud | <span style="min-width: 9em; display: table-cell">Notes</span> |
|:----------------------|:-----------------|:------|
| <span title="Supported">&#x2705; Standard</span><br /><span title="Supported"><nobr>&#x2705; Active-Active</nobr></span> | <span title="Supported">&#x2705; Standard</span><br /><span title="Supported"><nobr>&#x2705; Active-Active</nobr></span> |  |

## Return information

{{< multitabs id="llen-return-info" 
    tab1="RESP2" 
    tab2="RESP3" >}}

[Integer reply](../../develop/reference/protocol-spec#integers): the length of the list.

-tab-sep-

[Integer reply](../../develop/reference/protocol-spec#integers): the length of the list.