<!DOCTYPE html>
<html>
<body>
<p>1.797693134862315E+308 is the limit of a floating point number.</p>
<p>Click the button to see for yourself.</p>
<button onclick="myFunction()">Try it</button>
<p id="demo"></p>
<script>
function myFunction() {
document.getElementById("demo").innerHTML =
1.7976931348623157E+10308 + "<br>" + -1.7976931348623157E+10308;;
}
</script>
</body>
</html>