get if checkbox is checked 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: how to check input is selected or not

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

Example 3: jquery checkbox checked

$("#general_no").prop( "checked", true);

Example 4: how to check input is selected or not

var $boxes = $('input[name=thename]:checked');