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DECR

DECR key

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 value

Integer reply: the value of key after the decrement

Examples

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

© 2009–2020 Salvatore Sanfilippo
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https://redis.io/commands/decr