Java Reference
In-Depth Information
Exercise Questions
Suggested solutions to these questions can be found in Appendix A.
1.
Write a JavaScript program to convert degrees centigrade into degrees Fahrenheit, and to write
the result to the page in a descriptive sentence. The JavaScript equation for Fahrenheit to centi-
grade is as follows:
degFahren = 9 / 5 * degCent + 32
2.
The following code uses the prompt() function to get two numbers from the user. It then adds
those two numbers together and writes the result to the page:
<!DOCTYPE html PUBLIC “-//W3C//DTD XHTML 1.0 Transitional//EN”
“http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd”>
<html xmlns=”http://www.w3.org/1999/xhtml”>
<script language=”JavaScript” type=”text/javascript”>
var firstNumber = prompt(“Enter the first number”,””);
var secondNumber = prompt(“Enter the second number”,””);
var theTotal = firstNumber + secondNumber;
document.write(firstNumber + “ added to “ + secondNumber + “ equals “ +
theTotal);
</script>
</body>
</html>
However, if you try the code out, you'll discover that it doesn't work. Why not? Change the
code so that it does work.
