Redis Incrbyfloat command

Redis Strings (string)

The Redis Incrbyfloat command adds the specified floating-point increment value to the value stored in the key.

If the key does not exist, INCRBYFLOAT will first set the value of the key to 0, and then perform the addition operation.

Syntax

The basic syntax of the redis Incrbyfloat command is as follows:

redis　127.0.0.1:6379>　INCRBYFLOAT　KEY_NAME　INCR_AMOUNT

Available Versions

>= 2.6.0

Return Value

The value of the key after executing the command.

Online Examples

#　Neither　the　value　nor　the　increment　is in exponential notation
redis>　SET　mykey　10.50
OK
redis>　INCRBYFLOAT　mykey　0.1
"10.6"
#　Both　the　value　and　the　increment　are in exponential notation
redis>　SET　mykey　314e-2
OK
redis>　GET　mykey　　　　　　　　　　　　　　　　#　The　value　set　by　SET　can　be　in　exponential　notation
"314e-2"
redis>　INCRBYFLOAT　mykey　0　　　　　　#　But　the　format　will　be　changed　to　non-exponential　notation　after　executing　INCRBYFLOAT
"3.14"
#　You　can　perform　operations　on　integer　types
redis>　SET　mykey　3
OK
redis>　INCRBYFLOAT　mykey　1.1
"4.1"
#　The　0　that　follows　will　be　removed
redis>　SET　mykey　3.0
OK
redis>　GET　mykey　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　#　The　decimal　part　of　the　value　set　by　SET　can　be　0
"3.0"
redis>　INCRBYFLOAT　mykey　1.000000000000000000000　　　　#　But　INCRBYFLOAT　will　ignore　the　useless　0，and　if　necessary，convert　the　float　to　an　integer
"4"
redis>　GET　mykey
"4"

Redis Strings (string)