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<!DOCTYPE html>
<!-- Addition script. -->
<html>
<head>
<meta charset="utf-8">
<title>Add and Multiply Program</title>
<script>
var number1; // first number to add
var number2; // second number to add
var sum; // sum of number1 and number2
var product; // product of number1 and number2
// read in first number from user as a string, use the window object’s prompt method
// The window object is a global object - all methods and properties that are not part of another object are part of the window object
number1 = window.prompt("Enter first integer");
// read in second number from user as a string – note you can omit the object name and dot operator
// when referring to properties or attributes of the window object because it is global
number2 = window.prompt("Enter second integer");
number1 = parseInt(number1);
number2 = parseInt(number2);
sum = parseInt(number1) + parseInt(number2); // add the numbers
product = number1 * number2; //multiply the numbers
// display the results – uses the document object, highest object in the DOM structure. You have to use object name and dot operator.
document.writeln("<h1>The program returns " + sum + " as the sum, and</h1>");
document.writeln("<h1>" + product + " as the product</h1>");
</script>
</head>
<body></body>
</html>
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