Try it Editor: Mistake floats ok

Edit This Code :


<!DOCTYPE html>
<html>
<body>

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

<script>
var x = 0.1;
var y = 0.2;
var z = (x * 10 + y *10) / 10;
document.getElementById("demo").innerHTML = z;
</script>

</body>
</html>

Result :