How do I know which radio checked and which is not with jquery

Question

I am working on php quiz-test script.

I need to know which selected and which is not.

all radios are inside form, they are creating by while.

var myRadio = $("#form1 input[type='radio']:checked").val();
alert(myRadio);

this just returns 1 value, I have to many radio inside form.

<label>

      <input type="radio" name="<?php echo $s_id; ?>" value="<?php echo $cid; ?>"  />
      <?php echo $answer; ?>
</label>

jsfiddle

Answer 1

var myRadio = $('input[name=myRadio]');
var checkedValue = myRadio.filter(':checked').val();

or

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