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# Redis `string` commands (22/22 implemented)
## [APPEND](https://redis.io/commands/append/)
Appends a string to the value of a key. Creates the key if it doesn't exist.
## [DECR](https://redis.io/commands/decr/)
Decrements the integer value of a key by one. Uses 0 as initial value if the key doesn't exist.
## [DECRBY](https://redis.io/commands/decrby/)
Decrements a number from the integer value of a key. Uses 0 as initial value if the key doesn't exist.
## [GET](https://redis.io/commands/get/)
Returns the string value of a key.
## [GETDEL](https://redis.io/commands/getdel/)
Returns the string value of a key after deleting the key.
## [GETEX](https://redis.io/commands/getex/)
Returns the string value of a key after setting its expiration time.
## [GETRANGE](https://redis.io/commands/getrange/)
Returns a substring of the string stored at a key.
## [GETSET](https://redis.io/commands/getset/)
Returns the previous string value of a key after setting it to a new value.
## [INCR](https://redis.io/commands/incr/)
Increments the integer value of a key by one. Uses 0 as initial value if the key doesn't exist.
## [INCRBY](https://redis.io/commands/incrby/)
Increments the integer value of a key by a number. Uses 0 as initial value if the key doesn't exist.
## [INCRBYFLOAT](https://redis.io/commands/incrbyfloat/)
Increment the floating point value of a key by a number. Uses 0 as initial value if the key doesn't exist.
## [LCS](https://redis.io/commands/lcs/)
Finds the longest common substring.
## [MGET](https://redis.io/commands/mget/)
Atomically returns the string values of one or more keys.
## [MSET](https://redis.io/commands/mset/)
Atomically creates or modifies the string values of one or more keys.
## [MSETNX](https://redis.io/commands/msetnx/)
Atomically modifies the string values of one or more keys only when all keys don't exist.
## [PSETEX](https://redis.io/commands/psetex/)
Sets both string value and expiration time in milliseconds of a key. The key is created if it doesn't exist.
## [SET](https://redis.io/commands/set/)
Sets the string value of a key, ignoring its type. The key is created if it doesn't exist.
## [SETEX](https://redis.io/commands/setex/)
Sets the string value and expiration time of a key. Creates the key if it doesn't exist.
## [SETNX](https://redis.io/commands/setnx/)
Set the string value of a key only when the key doesn't exist.
## [SETRANGE](https://redis.io/commands/setrange/)
Overwrites a part of a string value with another by an offset. Creates the key if it doesn't exist.
## [STRLEN](https://redis.io/commands/strlen/)
Returns the length of a string value.
## [SUBSTR](https://redis.io/commands/substr/)
Returns a substring from a string value.
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