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Increments the number stored at key by increment. 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 increment

@examples

SET mykey "10"
INCRBY mykey 5
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