---
acl_categories:
- '@write'
- '@list'
- '@fast'
arguments:
- display_text: key
  key_spec_index: 0
  name: key
  type: key
- display_text: element
  multiple: true
  name: element
  type: string
arity: -3
categories:
- docs
- develop
- stack
- oss
- rs
- rc
- oss
- kubernetes
- clients
command_flags:
- write
- denyoom
- fast
complexity: O(1) for each element added, so O(N) to add N elements when the command
  is called with multiple arguments.
description: Prepends one or more elements to a list only when the list exists.
group: list
hidden: false
history:
- - 4.0.0
  - Accepts multiple `element` arguments.
key_specs:
- RW: true
  begin_search:
    spec:
      index: 1
    type: index
  find_keys:
    spec:
      keystep: 1
      lastkey: 0
      limit: 0
    type: range
  insert: true
linkTitle: LPUSHX
railroad_diagram: /images/railroad/lpushx.svg
since: 2.2.0
summary: Prepends one or more elements to a list only when the list exists.
syntax_fmt: LPUSHX key element [element ...]
title: LPUSHX
---
Inserts specified values at the head of the list stored at `key`, only if `key`
already exists and holds a list.
In contrary to [`LPUSH`](/content/commands/lpush.md), no operation will be performed when `key` does not yet
exist.

## Required arguments

<details open><summary><code>key</code></summary>

The name of the key that holds the list.

</details>

<details open><summary><code>element [element ...]</code></summary>

One or more values to prepend to the list, only if it already exists.

</details>

## Examples

{{% redis-cli %}}
redis> LPUSH mylist "World"
(integer) 1
redis> LPUSHX mylist "Hello"
(integer) 2
redis> LPUSHX myotherlist "Hello"
(integer) 0
redis> LRANGE mylist 0 -1
1) "Hello"
2) "World"
redis> LRANGE myotherlist 0 -1
(empty array)
{{% /redis-cli %}}

## Redis Software and Redis Cloud compatibility

| Redis<br />Software | 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="lpushx-return-info" 
    tab1="RESP2" 
    tab2="RESP3" >}}

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

-tab-sep-

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

{{< /multitabs >}}