<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>
<script>
function calculate() {
document.write(age2 - age1);
}
function printResult(text) {
document.write(text);
calculate();
}
var age1 = 29;
var age2 = 35;
printResult('The age difference between my sister and me is ');
</script>
</body>
</html>
