INCRBY key increment

Available since 1.0.0.

Time complexity: O(1)

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.

*Return value

Integer reply: the value of key after the increment

*Examples

redis> SET mykey "10" 

  1. "OK"

redis> INCRBY mykey 5 

  1. (integer) 15
redis>