Edit This Code:
<!DOCTYPE html>
<html>
<head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.2/jquery.min.js"></script>
<script>
$(document).ready(function(){
    $("button").click(function(){
        $("div").height(function(n,c){
        return c+200;
        });
    });
});
</script>
</head>
<body>

<button>Increase height of div with 200 px</button><br><br>

<div style="height:100px;border:4px solid;"></div>

</body>
</html>


Result:
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