toUpperCase method is used to convert a string into uppercase in jQuery. This functions returns a uppercase string. It will not modify the current variable, So you need to re-assign it.
var name = 'India';
alert(name.toUpperCase());
CODE
<!DOCTYPE html>
<html>
<head>
<title>jQuery With Example</title>
<script src="http://code.jquery.com/jquery-1.9.1.js" type="text/javascript"></script>
<script type="text/javascript">
$(function () {
$('.btnClick').click(function () {
var name = 'India';
alert(name.toUpperCase());
alert(name);
});
});
</script>
</head>
<body>
<div>
<button class="btnClick">Click</button>
</div>
</body>
</html>
DISPLAY
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