HINCRBY key field increment

Available since 2.0.0.

Time complexity: O(1)

Increments the number stored at field in the hash stored at key by increment. If key does not exist, a new key holding a hash is created. If field does not exist the value is set to 0 before the operation is performed.

The range of values supported by HINCRBY is limited to 64 bit signed integers.

*Return value

Integer reply: the value at field after the increment operation.

*Examples

Since the increment argument is signed, both increment and decrement operations can be performed:

redis> HSET myhash field 5 

  1. (integer) 1

redis> HINCRBY myhash field 1 

  1. (integer) 6

redis> HINCRBY myhash field -1 

  1. (integer) 5

redis> HINCRBY myhash field -10 

  1. (integer) -5
redis>