Index.html
<!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()">
Sum
</button>
</center>
<script src="js/script.js"></script>
</body>
</html>
script.js
// let a = prompt("You have to enter something", "hello Bilal")
// console.log(a)
function sum() {
let a = prompt("enter first value")
let b = prompt("enter second value")
let result = parseInt(a) + parseInt(b)
// let a = "20"
// let b = "40"
console.log(result);
}
// let firstName = "Muhammmad"
// let lastName = "Lucky"
// alert("hello " + firstName + " your last name is " + lastName)
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