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	Command reference

ARLEN

Array is a new data type that is currently in preview and may be subject to change.

Syntax text Syntax diagram API methods

ARLEN key

Client:

arlen(
    name: KeyT
) → int

arLen(
    key: RedisArgument
) → NumberReply

arlen(
    key: K  // the key of the array.
) → Long  // the logical length, or 0 if the key does not exist.

arlen(
    key: K  // the key of the array.
) → RedisFuture<Long>  // the logical length, or 0 if the key does not exist.

arlen(
    key: K  // the key of the array.
) → Mono<Long>  // the logical length, or 0 if the key does not exist.

ARLen(
    ctx: context.Context,  // Context
    key: string
) → *UintCmd

arlen(
    $key: string
) → int

Returns the length of an array (max index + 1).

key

The name of the key that holds the array.

redis> ARSET myarray 0 "a"
(integer) 1
redis> ARSET myarray 5 "b"
(integer) 1
redis> ARLEN myarray
(integer) 6
redis> ARCOUNT myarray
(integer) 2

Redis Software	Redis Cloud	Notes
❌ Standard ❌ Active-Active	❌ Standard ❌ Active-Active

RESP2 RESP3

Integer reply: The length of the array (max index + 1), or 0 if key does not exist.