Redis

HINCRBY key field increment

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
(integer) 1
redis>  HINCRBY myhash field 1
(integer) 6
redis>  HINCRBY myhash field -1
(integer) 5
redis>  HINCRBY myhash field -10
(integer) -5
redis> 
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