# ObjNumber

Filter Content By
Version
Languages

### ObjNumber

Selects objective index of multi-objectives
Type: int 0 0 2000000000

When working with multiple objectives, this parameter selects the index of the objective you want to work with. When you modify an attribute associated with multiple objectives (ObjN, ObjNVal, etc.), the ObjNumber parameter will determine which objective is actually affected. The value of this parameter should be less than the value of the NumObj attribute (which captures the number of objectives in the model).

For examples of how to query or modify parameter values from our different APIs, refer to our Parameter Examples.