# APPEND Redis APPEND command is used to add some value in a key. If the key already exists and is a string, this command appends the value at the end of the string. If key does not exist it is created and set as an empty string, Learn more from the following resources: - [@official@APPEND](https://redis.io/docs/latest/commands/append/) - [@article@Redis - String Append Command](https://www.tutorialspoint.com/redis/strings_append.htm)