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Add new range constraints to a model. A range constraint states that the value of the input expression must be between the specified lower and upper bounds in any solution.

GRBConstr[] addRanges ( GRBLinExpr[] exprs,
    double[] lower,
    double[] upper,
    String[] names )

    exprs: Linear expressions for the new range constraints.

    lower: Lower bounds for linear expressions.

    upper: Upper bounds for linear expressions.

    names: Names for new range constraints.

    Return value:

    Array of new constraint objects.

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