JQuery: How to get selected radio button value?

Question

How do I default the value of a non-selected radio button to 0?

I have the following HTML:

Answer 1

To get the value of the selected Radio Button, Use RadioButtonName and the Form Id containing the RadioButton.

$('input[name=radioName]:checked', '#myForm').val()

OR by only

$('form input[type=radio]:checked').val();