Try it Editor: JavaScript Function Closures

Edit This Code :


<!DOCTYPE html>
<html>
<body>

<h2>JavaScript Function Closures</h2>

<p>Counting with a local variable.</p>

<p id="demo">0</p>

<script>
document.getElementById("demo").innerHTML = add();
function add() {
    var counter = 0;
    function plus() {counter += 1;}
    plus();    
    return counter; 
}
</script>

</body>
</html>

Result :