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# Redis STRLEN Command [!(#) Redis Strings](#) The Redis STRLEN command is used to get the length of the string value stored at a specified key. It returns an error if the value stored at the key is not a string. ### Syntax The basic syntax for the Redis STRLEN command is as follows: redis 127.0.0.1:6379> STRLEN KEY_NAME ### Available Since >= 2.2.0 ### Return Value The length of the string value. Returns 0 when the key does not exist. ### Example # Get the length of a string redis> SET mykey "Hello world" OK redis> STRLEN mykey (integer) 11# Length of a non-existing key is 0 redis> STRLEN nonexisting (integer) 0 [!(#) Redis Strings](#)