Increments the integer value of a key by a number. Uses 0 as initial value if the key doesn’t exist.
INCRBY
key
increment
Increments the number stored at key
by
increment
. If the key does not exist, it is set to
0
before performing the operation. An error is returned if
the key contains a value of the wrong type or contains a string that can
not be represented as integer. This operation is limited to 64 bit
signed integers.
See INCR
for extra information on increment/decrement
operations.
Integer reply: the value of the key after the increment.
O(1)
@fast @string @write
127.0.0.1:6379> SET mykey "10"
OK
127.0.0.1:6379> INCRBY mykey 5
(integer) 15
APPEND, DECR, DECRBY, GET, GETDEL, GETEX, GETRANGE, INCR, INCRBYFLOAT, LCS, MGET, MSET, MSETNX, SET, SETRANGE, STRLEN.