# QuadExpr()

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### QuadExpr()

QuadExpr ( expr = None )

Quadratic expression constructor. Note that you should generally use overloaded operators instead of the explicit constructor to build quadratic expression objects.

Arguments:

expr (optional): Initial value of quadratic expression. Can be a LinExpr or a QuadExpr. If no argument is specified, the initial expression value is 0.

Return value:

A quadratic expression object.

Example usage:

  expr = QuadExpr()
expr = QuadExpr(2*x)
expr = QuadExpr(x*x + y+y)