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JavaScript
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// Example JavaScript function
function greetUser(name = "Developer") {
  const currentHour = new Date().getHours();
  let greeting = "Hello";
  
  if (currentHour < 12) {
    greeting = "Good morning";
  } else if (currentHour < 18) {
    greeting = "Good afternoon";
  } else {
    greeting = "Good evening";
  }
  
  console.log(greeting + ", " + name + "!");
  return { message: greeting, date: new Date() };
}