Lecture 27

 <!DOCTYPE html>

<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>



</head>

<body>


    <center>
        <button onclick="sum()">Click me</button>
    </center>

    <script src="js/script.js">

    </script>
</body>

</html>


Script.js


// alert("Hello world")
// document.write("<h2 align='center'> Hello World</h2>")
// console.log('Hello this is log')



function sum() {
    alert(30 + 20)
   
}


// sum()
// sum()
// sum()
// sum()
// sum()
// sum()

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