DECR

Syntax

DECR key

Time complexity: O(1)

Decrements the number stored at key by one. If the key does not exist, it is set to 0 before performing the operation. An error is returned if the key contains a value of the wrong type or contains a string that can not be represented as integer. This operation is limited to 64 bit signed integers.

See INCR for extra information on increment/decrement operations.

Return

Integer reply: the value of key after the decrement

Examples

dragonfly> SET mykey "10"
"OK"
dragonfly> DECR mykey
(integer) 9
dragonfly> SET mykey "234293482390480948029348230948"
"OK"
dragonfly> DECR mykey
"value is not an integer or out of range"