jQuery - Radio, Checkbox get value

// radio button
$('input[name=name_of_your_radiobutton]:checked').val();

// checkbox
var language = [];
$('input[name=keeper_language]:checked').each(function () {
    language.push($(this).val());
});


// Radio Button on Change
$("input[name=new_promocode_discount_type]:radio").change(function () {
    console.log('changed type');
    console.log($('input[name=new_promocode_discount_type]:checked').val());
    if($('input[name=new_promocode_discount_type]:checked').val()=="percentage"){

    }else if($('input[name=new_promocode_discount_type]:checked').val()=="fixed"){

    }
  });

// Retrieve Value of Data Attribute
$("#").find(':selected').data('');