ZINCRBY _key_ _increment_ _member_ (Redis >

If member already exists in the sorted set adds the increment to its scoreand updates the position of the element in the sorted set accordingly.If member does not already exist in the sorted set it is added with_increment_ as score (that is, like if the previous score was virtually zero).If key does not exist a new sorted set with the specified_member_ as sole member is crated. If the key exists but does not hold asorted set value an error is returned.

The score value can be the string representation of a double precision floatingpoint number. It's possible to provide a negative value to perform a decrement.

For an introduction to sorted sets check the Introduction to Redis data types page.

Return value

The score of the member after the increment is performed.