Redis ZREVRANK command returns the rank of the member in the sorted set stored at the key, with the scores ordered from high to low. The rank (or index) is 0-based, which means that the member with the highest score has rank 0.
If the member exists in the sorted set, Integer reply − the rank of member.
If the member does not exist in the sorted set or the key does not exist, Bulk string reply − nil.
Following is the basic syntax of Redis ZREVRANK command.
redis 127.0.0.1:6379> ZREVRANK key member
redis 127.0.0.1:6379> ZADD myzset 1 b 2 c 3 d 4 e (integer) 4 redis 127.0.0.1:6379> ZREVRANK myzset "c" (integer) 3 redis 127.0.0.1:6379> ZREVRANK myzset "y" (nil)