what is a use of double !! in javascript code example

Example: double javascript

<!DOCTYPE html>
<html>
<body>

<h2>JavaScript Numbers</h2>

<p>Numbers can be written with or without decimals:</p>

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

<script>
var x = 3.14;
var y = 3;
document.getElementById("demo").innerHTML = x + "<br>" + y;
</script>

</body>
</html>

Tags:

Javascript Example

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