DECR

Syntax

  1. 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

  1. dragonfly> SET mykey "10"
  2. "OK"
  3. dragonfly> DECR mykey
  4. (integer) 9
  5. dragonfly> SET mykey "234293482390480948029348230948"
  6. "OK"
  7. dragonfly> DECR mykey
  8. "value is not an integer or out of range"