redis llen命令

LLEN key

Returns the length of the list stored at key.
If key does not exist, it is interpreted as an empty list and 0 is returned.
An error is returned when the value stored at key is not a list.


Integer reply: the length of the list at key.


redis>  LPUSH mylist “World”

(integer) 1

redis>  LPUSH mylist “Hello”

(integer) 2

redis>  LLEN mylist

(integer) 2