check which option radio is checked jqqery code example

Example 1: if radio checked jquery

$('#element').click(function() {
   if($('#radio_button').is(':checked')) { alert("it's checked"); }
});

Example 2: How can I know which radio button is selected via jQuery

if ($('input[name="radioName"]:checked', '#myForm').length) {
	//Yes, it's checked!
}