Java Script Array Advanced Methods

<!DOCTYPE html>
<html>
<body>

<h2>JavaScript Arrays</h2>

<p>Click the button to get every element in the array that has a value of 18 or more.</p>
<script>
const ages = [32, 33, 16, 40];

document.write( ages.filter(checkAdult));

function checkAdult(age) {
  return age >= 18;
}
</script>

</body>
</html>