Let’s explore a few utility commands provided by Redis to perform operations on the data stored.

The DECR and DECRBY commands

As the name suggests, the DECR command is used to decrement a value by one. On the other hand, the DECBY command is used to decrement the value by the number specified in the command. Both commands can be performed on string values, which can be converted to integers. If the key specified doesn’t exist, each of the commands creates a key-value pair with the value 0 and then performs the decrement operation. Both commands return the value after performing the decrement operation.

Syntax and example

The syntax of the DECR and DECRBY commands is shown below:

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