DECR

Decrease value for the key when it is parsable to integer

Syntax

DECR key

Decrements the integer value stored at key by 1. If the key doesn’t exist, it is initialized to 0 before performing the operation. The value must be parsable as an integer or an error will be returned.

Example

duva-cli> SET key "3"
"OK"
duva-cli> DECR key
(integer) 2
duva-cli> SET key "334293482390480948029348230948"
"OK"
duva-cli> DECR mykey
(error) ERR value is not an integer or out of range 

Return value: Integer reply - the value after incrementation

Notes

• Works only with string values that can be represented as integers
• If the key contains a value of the wrong type or contains a string that can’t be represented as integer, an error is returned
• The maximum value of a signed 64-bit integer is 9223372036854775807