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DECR

Syntax​

DECR key

Time complexity: O(1)

ACL categories: @write, @string, @fast

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"