ZSCORE

Available since 1.2.0.

Time complexity: O(1)

Returns the score of member in the sorted set at key.

If member does not exist in the sorted set, or key does not exist, nil is returned.

*Return value

Bulk string reply: the score of member (a double precision floating point number), represented as string.

redis> ZADD myzset 1 "one"

(integer) 1

redis> ZSCORE myzset "one"

"1"