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                Redis INCRBYFLOAT命令用于遞增代表存儲在由指定的增量key浮點數的字符串。如果key不存在時,它被設置為0在執行操作之前。如果key包含錯誤的類型或當前key內容或指定的增量值不是可解析為浮點數,則連接返回錯誤。 ## 返回值 回復字符串,是增加后key的值。 ## 語法 redis INCRBYFLOAT命令的基本語法如下所示: ~~~ redis 127.0.0.1:6379> INCRBYFLOAT KEY_NAME INCR_AMOUNT ~~~ ### 例子 ~~~ redis 127.0.0.1:6379> SET visitors 1000.20 OK redis 127.0.0.1:6379> INCRBYFLOAT visitors .50 1000.70 redis 127.0.0.1:6379> GET visitors 1000.70 ~~~
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