| Overview | Group | Index | Concepts | 
The routine CPXdelqconstrs deletes a range of quadratic
 constraints. The range
 is specified by a lower and upper index that represent the 
 first and last quadratic constraints to be deleted, respectively.
 The indices of the constraints following those
 deleted are decreased by the number of deleted constraints.
Example
status = CPXdelqconstrs (env, lp, 10, 20);
| env | A pointer to the CPLEX environment as returned by   | 
| lp | A pointer to a CPLEX problem object as returned by   | 
| begin | An integer that indicates the numeric index of the first quadratic constraint to be deleted.  | 
| end | An integer that indicates the numeric index of the last quadratic constraint to be deleted.  |