how to checked checkbox in jquery code example

Example 1: How to check whether a checkbox is checked in jQuery?

//using plane javascript 
if(document.getElementById('on_or_off_checkbox').checked) {
    //I am checked
} 

//using jQuery
if($('#on_or_off_checkbox').is(':checked')){
    //I am checked
}

Example 2: jquery set checkbox checked unchecked

//jQuery 1.6+ use
$('.checkbox').prop('checked', true);  //false for uncheck
//jQuery 1.5.x and below use
$('.checkbox').attr('checked', true);  //false for uncheck

Example 3: jquery check checkbox

$('.myCheckbox').prop('checked', true);
$('.myCheckbox').prop('checked', false);

Example 4: check a checkbox jquery

$('#grepperRocks').prop('checked', true);

Example 5: How do I check whether a checkbox is checked in jQuery?

$('#' + id).is(":checked")

Example 6: how get checkbox if checked in jquery

if($("#rule").is(":checked")){
    $("#form").submit();
 }