RPOP command in redis

RPOP key

Atomically return and remove the last (RPOP) element of the list.

TIME COMPLEXITY: O(1)

If the key does not exist or the list is already empty the special value 'nil' is returned.

RETURN VALUE: Bulk reply.

Syntax:

RPOP key

Example 1: When the list is present

redis:6379> LPUSH myList 100
(integer) 1
redis:6379> LPUSH myList 200
(integer) 2
redis:6379> LPUSH myList 300
(integer) 3
redis:6379> RPOP myList
"100"

Output

100

Example 2: When the list is not present

redis:6379> RPOP myList2
(nil)

Output

nil