Tryit Editor v2.9

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

<p>Integers are considered accurate up to 15 digits.</p>

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

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

<script>
function myFunction() {
    var x = 999999999999999;
    var y = 9999999999999999;
    document.getElementById("demo").innerHTML = x + "<br>" + y;
}
</script>

</body>
</html>