P E N C I L
Login
TextField
 final productController = TextEditingController();

  @override
  void dispose() {
    productController.dispose();
    super.dispose();
  }
  
  TextFormField(
        keyboardType: TextInputType.number,
        decoration: InputDecoration(
          hintText: 'Quantity',
          labelText: 'Quantity',
        ),
      )
      
  productController.text