LLEN key

Available since 1.0.0.

Time complexity: O(1)

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.

*Return value

Integer reply: the length of the list at key.

*Examples

redis> LPUSH mylist "World" 

  1. (integer) 1

redis> LPUSH mylist "Hello" 

  1. (integer) 2

redis> LLEN mylist 

  1. (integer) 2
redis>