jquery checbox is checked code example
Example 1: checkbox is checked jquery
$(your_checkbox).is(':checked');
Example 2: how do i check if JQuery checkbox is checked
$('#isAgeSelected').click(function() {
$("#txtAge").toggle(this.checked);
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js">
</script>
<input type="checkbox" id="isAgeSelected"/>
<div id="txtAge" style="display:none">Age is something</div>