SCARD

Syntax text Syntax diagram API methods

SCARD key

Client:

scard(
    name: KeyT
) → Union[Awaitable[int], int]

SCARD(
    key: RedisArgument
) → Any

scard(
    key: byte[]
) → long  // The cardinality (number of elements) of the set as an integer

scard(
    key: String
) → long  // The cardinality (number of elements) of the set as an integer

scard(
    key: K  // the key.
) → Long  // Long integer-reply the cardinality (number of elements) of the set, or false if key does not exist.

scard(
    key: K  // the key.
) → RedisFuture<Long>  // Long integer-reply the cardinality (number of elements) of the set, or false if key does not exist.

scard(
    key: K  // the key.
) → Mono<Long>  // Long integer-reply the cardinality (number of elements) of the set, or false if key does not exist.

SCard(
    ctx: context.Context,
    key: string
) → *IntCmd

SetLength(
    key: RedisKey,  // The key of the set.
    flags: CommandFlags  // The flags to use for this operation.
) → long  // The cardinality (number of elements) of the set, or 0 if key does not exist.

SetLength(
    key: RedisKey,  // The key of the set.
    flags: CommandFlags  // The flags to use for this operation.
) → long  // The cardinality (number of elements) of the set, or 0 if key does not exist.

SetLength(
    key: RedisKey,  // The key of the set.
    flags: CommandFlags  // The flags to use for this operation.
) → long  // The cardinality (number of elements) of the set, or 0 if key does not exist.

SetLength(
    key: RedisKey,  // The key of the set.
    flags: CommandFlags  // The flags to use for this operation.
) → long  // The cardinality (number of elements) of the set, or 0 if key does not exist.

scard(
    $key: string
) → int

scard(
    key: K
) → (usize)

scard(
    key: K
) → (usize)

Available since:: Redis Open Source 1.0.0
Time complexity:: O(1)
ACL categories:: @read, @set, @fast,
Compatibility:: Redis Software and Redis Cloud compatibility

Returns the set cardinality (number of elements) of the set stored at key.

Required arguments

key

The name of the key that holds the set.

Examples

Redis Software and Redis Cloud compatibility

Redis Software	Redis Cloud	Notes
✅ Standard ✅ Active-Active	✅ Standard ✅ Active-Active

Return information

RESP2 RESP3

Integer reply: the cardinality (number of elements) of the set, or 0 if the key does not exist.