INCRBYFLOAT - Upstash Documentation

Use INCRBYFLOAT to add a floating point number to the value stored at a key and get the result.

The stored value and the increment are parsed as double precision floats, and a missing key counts as 0. A negative increment subtracts, and there is no separate decrement command. A value that is not a valid number returns an error.

The reply is the new value as a string, which client libraries usually decode into a native number. The result is stored in that same textual form, so repeated increments accumulate the usual binary floating point rounding error: for money and other exact quantities, count in integer units with INCRBY instead.

Syntax#

INCRBYFLOAT <key> <increment>

Arguments#

Argument	Required	Repeatable	Description
`<key>`	Yes	No	Redis key targeted by the command.
`<increment>`	Yes	No	Amount to add to the value; may be a floating-point number.

Important points#

The value is always returned as a bulk string, in both RESP2 and RESP3. Client libraries commonly decode it to a language number.

Response#

The reply reports the result of the operation. Error replies have the same shape in RESP2 and RESP3 and are surfaced as exceptions by the SDKs below.

Protocol	Reply
RESP2	Bulk string
RESP3	Bulk string

Note

Client libraries often decode bulk strings, maps, sets, and numeric strings into language-native values. The table describes the Redis wire reply.

Examples#

TCP examples use the TLS REDIS_URL from the Upstash console. REST examples use UPSTASH_REDIS_REST_URL and UPSTASH_REDIS_REST_TOKEN.

Redis CLI

INCRBYFLOAT my-key 1.5

@upstash/redis

import { Redis } from "@upstash/redis";const redis = Redis.fromEnv();await redis.set("key", 6);await redis.incrbyfloat("key", 4,5);// returns 10.5

upstash_redis

from upstash_redis import Redisredis = Redis.from_env()result = redis.incrbyfloat("my-key", 1.5)print(result)

ioredis

import Redis from "ioredis";const redis = new Redis(process.env.REDIS_URL!);const result = await redis.incrbyfloat("my-key", "1.5");console.log(result);

node-redis

import { createClient } from "redis";const client = await createClient({ url: process.env.REDIS_URL })  .on("error", console.error)  .connect();const result = await client.incrByFloat("my-key", 1.5);console.log(result);

redis-py

import osimport redisclient = redis.from_url(os.environ["REDIS_URL"])result = client.incrbyfloat("my-key", 1.5)print(result)

go-redis

package mainimport (    "context"    "fmt"    "os"    "github.com/redis/go-redis/v9")func main() {    opts, err := redis.ParseURL(os.Getenv("REDIS_URL"))    if err != nil {        panic(err)    }    client := redis.NewClient(opts)    result, err := client.IncrByFloat(context.Background(), "my-key", 1.5).Result()    if err != nil {        panic(err)    }    fmt.Println(result)}

jedis

import java.net.URI;import redis.clients.jedis.Jedis;try (Jedis jedis = new Jedis(new URI(System.getenv("REDIS_URL")))) {  Object result = jedis.incrByFloat("my-key", 1.5);  System.out.println(result);}

redis-rs

use redis::TypedCommands;fn main() -> redis::RedisResult<()> {    let url = std::env::var("REDIS_URL").expect("REDIS_URL is not set");    let client = redis::Client::open(url)?;    let mut connection = client.get_connection()?;    let result = connection.incr("my-key", 1.5)?;    println!("{result:?}");    Ok(())}