Use <br> tag for a new line.
Example
Following is the code −
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<link rel="stylesheet" href="//code.jquery.com/ui/1.12.1/themes/base/jquery-ui.css">
<script src="https://code.jquery.com/jquery-1.12.4.js"></script>
<script src="https://code.jquery.com/ui/1.12.1/jquery-ui.js"></script>
<body>
<h1 id="headingDemo">
My Name is David Miller
</h1>
</body>
<script>
document.getElementById("headingDemo").innerHTML = "My Favourite Subject is JavaScript" + '<br>' + "I live in AUS.";
</script>
</html>To run the above program, save the file name anyName.html (index.html). Right click on the file and select the option “Open with Live Server” in VS Code editor.
The output is as follows −
