Tryit Editor v2.9

Edit This Code:
<!DOCTYPE html>
<html>
<body>

<p>Click the button to get every element in the array that has a value of 18 or more.</p>

<button onclick="myFunction()">Try it</button>

<p id="demo"></p>

<script>
var ages = [32, 33, 16, 40];

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

function myFunction() {
    document.getElementById("demo").innerHTML = ages.filter(checkAdult);
}
</script>

</body>
</html>