jquery checkbox checked value

if ($('#check_id').is(":checked"))
{
  // it is checked
}console.log($('input[name="locationthemes"]:checked').serialize());

//or

$('input[name="locationthemes"]:checked').each(function() {
   console.log(this.value);
});if ($('[name="your_input_checkbox_name"]').is(":checked"))
{
  // it is checked
} else {
  // it isn't checked	
}$("input[type='checkbox']").val();
$('#check_id').val();