Redis ZCOUNT command returns the number of elements in the sorted set at the key with a score between min and max.
Return Value
Integer reply, the number of elements in the specified score range.
Syntax
Following is the basic syntax of Redis ZCOUNT command.
redis 127.0.0.1:6379> ZCOUNT KEY_NAME
Example
redis 127.0.0.1:6379> ZADD myset 1 "hello" (integer) 1 redis 127.0.0.1:6379> ZADD myset 1 "foo" (integer) 1 redis 127.0.0.1:6379> ZADD myset 2 "world" 3 "bar" (integer) 2 redis 127.0.0.1:6379> ZCOUNT myzset (1 3 (integer) 2