LLEN
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.
Syntax
LLEN key
Details
- Available since: 1.0.0
- Time complexity: O(1)
- ACL categories:
@read,@list,@fast
Examples
First, add some elements to a list:
LPUSH mylist "World"
LPUSH mylist "Hello"
Then retrieve the length of the list:
LLEN mylist
This will output:
(integer) 2
RESP2/RESP3 Reply
Integer reply: the length of the list.