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Docs > Redis Commands > H > Hincrbyfloat
Increment the specified field
of a hash stored at key
, and representing a
floating point number, by the specified increment
. If the increment value
is negative, the result is to have the hash field value decremented instead of incremented.
If the field does not exist, it is set to 0
before performing the operation.
An error is returned if one of the following conditions occur:
- The field contains a value of the wrong type (not a string).
- The current field content or the specified increment are not parsable as a double precision floating point number.
The exact behavior of this command is identical to the one of the INCRBYFLOAT
command, please refer to the documentation of INCRBYFLOAT
for further
information.
@return
@bulk-string-reply: the value of field
after the increment.
@examples
HSET mykey field 10.50
HINCRBYFLOAT mykey field 0.1
HINCRBYFLOAT mykey field -5
HSET mykey field 5.0e3
HINCRBYFLOAT mykey field 2.0e2
Implementation details
The command is always propagated in the replication link and the Append Only
File as a HSET
operation, so that differences in the underlying floating point
math implementation will not be sources of inconsistency.