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# STRLEN

> Return the length of a string stored at a key.

The `STRLEN`` command in Redis is used to find the length of the string value associated with a key. In Redis, keys can be associated with various data types, and one of these data types is the "string." The STRLEN command specifically operates on keys that are associated with string values.
## Arguments

<ParamField body="key" type="str" required>
The name of the Redis key.
</ParamField>

## Response

<ResponseField type="int" required>
  The length of the value.
</ResponseField>

<RequestExample>
```py Example
redis.set("key", "Hello World")

assert redis.strlen("key") == 11
```

</RequestExample>