Decrement a numerical key’s value by the given number if the key/value pair exists.

syntax:

decr <key> <value> [noreply]

parameters:

• value - The data that needs to be stored.
• noreply - This optional parameter tells the server not to send any reply.

example:

decr mykey 3

2

output notes:

• 3 → Subtract 3 from the value of “mykey”
• In this example, if “mykey” had a value of “5”, after running decr, its value would be “2”.

possible errors:

• NOT_FOUND - indicates that the key does not exist.
• CLIENT_ERROR - indicates that the value associated with “mykey” is not numerical.
• ERROR - indicates any other error, such as a syntax error.