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# Redis SETNX Command [!(#) Redis Strings](#) The Redis SETNX (**SET** if **N**ot e**X**ists) command sets the value for a specified key only if the key does not already exist. ### Syntax The basic syntax for the Redis SETNX command is as follows: redis 127.0.0.1:6379> SETNX KEY_NAME VALUE ### Available Since >= 1.0.0 ### Return Value Returns 1 if the setting is successful. Returns 0 if the setting fails. ### Example redis> EXISTS job # job does not exist (integer) 0 redis> SETNX job "programmer" # job is set successfully (integer) 1 redis> SETNX job "code-farmer" # attempt to overwrite job, fails (integer) 0 redis> GET job # was not overwritten "programmer" [!(#) Redis Strings](#) AI is thinking... [](#)(#) (#)[](#)