jquery if check box unchecked code example

Example 1: get unchecked checkbox jquery

if ($("#check_box_id").is(':checked')) {
  alert("checked");
}else{
  alert("unchecked");
}

Example 2: jquery checkbox unchecked

$("input:radio[name='NAME']:radio[value='VALUE']").attr("checked",true);
$("input:radio[name='NAME']").removeAttr("checked");