Exercise:

Use the css() method to add a 5 pixels, red dotted border to <p>.

構文のヒント：css("propertyname","value");

<!DOCTYPE html>
<html>
<head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script>
<script>
$(document).ready(function(){
    構文のヒント：css("propertyname","value");
});
</script>
</head>
<body>

<p>This is a paragraph.</p>

</body>
</html>