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

@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:

HSET myhash field 5
HINCRBY myhash field 1
HINCRBY myhash field -1
HINCRBY myhash field -10