jquery is checked
snippet in javascript

jquery if checkbox checked

user1890

$( "SELECTOR" ).attr( "checked" )  // Returns ‘true’ if present on the element, returns undefined if not present
$( "SELECTOR" ).prop( "checked" ) // Returns true if checked, false if unchecked.
$( "SELECTOR" ).is( ":checked" ) // Returns true if checked, false if unchecked.

jquery checkbox checked value

user8053

if ($('#check_id').is(":checked"))
{
  // it is checked
}

jquery checkbox checked

user8201

$("checkbox").is(":checked")

check whether a checkbox is checked in jQuery

user3465

if ($('#grepperRocks').is(':checked')) {
	// this checkbox is checked
}

is checked jquery

user1176

.is(':checked')

jquery is checked

user6144

if ($('[name="your_input_checkbox_name"]').is(":checked"))
{
  // it is checked
} else {
  // it isn't checked	
}