Untitled

var demo = document.getElementById("demo");

var num1 = parseInt(prompt("Enter number 1", "1"));

function calc(number) {
    var answer = 0;
    answer = number * number * number;

    return answer;
}

demo.innerHTML = "value: " + num1;

/* HTML */
<!DOCTYPE html>
<html>
<head>
<script src="js/s2ex2.js"> </script>
<title>Exercises</title>
</head>
<body>
<p id="demo">This is some text</p>
</body>
</html>