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<!DOCTYPE html> <html> <body> <h2>JavaScript if .. else</h2> <p>A time-based greeting:</p> <p id="demo"></p> <script> const time = new Date().getHours(); let greeting; if (time < 10) { greeting = "Good morning"; } else if (time < 20) { greeting = "Good day"; } else { greeting = "Good evening"; } document.getElementById("demo").innerHTML = greeting; </script> </body> </html>