flutter calculator - how to show an error msg when user divide by zero

Question

I'm trying to validate that the second number is not zero only when user try to divide my code

Answer 1

onPressed: () {
  if (int.parse(secondNumberController.text) == 0) {
    // show error message here
    ScaffoldMessenger.of(context).showSnackBar(
      const SnackBar(
        content: Text('second num should not be zero!'),
      ),
    );
    return;
  }
  setState(() {
    double divide = int.parse(firstNumberController.text) /
        int.parse(secondNumberController.text);
    result = divide.toString();
  });
},