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<html><body><h1 id="demo"></h1><script>function renderApp() { document.getElementById("demo").innerHTML = "Welcome!";}function renderLogin() { document.getElementById("demo").innerHTML = "Please log in";}let authenticated = true;if (authenticated) { renderApp();} else { renderLogin();}</script><p>Try changing the "authenticated" variable to false, and run the code to see what happens.</p></body></html>