Post-lab Questions
LAB 4.1
Write your answers after completing the lab, but read them carefully now and keep them
in mind during the lab.

1. A programming language is designed to be a human-readable (and -writeable!)
way to tell computers what to do. Programming languages allow us to give
computers instructions. Most computer scientists would agree that JavaScript is a
programming language, but many would not consider HTML one. Discuss one
similarity between JavaScript and HTML that suggests both might be
programming languages.  JavaScript is an extension to HTML. You can write JavaScript
programs inside your HTML web page files. 
Discuss one difference between JavaScript and HTML that suggests only
JavaScript is a programming language.

2. Consider the concepts of input and output in the context of everyday devices. The
telephone takes input via its dialing buttons (or dial, if you have a rotary phone)
and the end of the handset you speak into. Phone output comes from the ringer
and the end of the handset you listen to. Consider each the following everyday
devices and describe their input and output as thoroughly as possible: television,
portable CD player. TV takes input byt he remote buttons and its output from the changing of channels.
The CD player takes input from the cd and the buttons and the output from the headphones and 
the music you hear.

3. Consider the short JavaScript program you work with in Parts 2 and 3 of this lab.
Does this program have input, output, both? both
Describe the input and/or output.
How about the currency converter program? Does this program have input,
output, or both? both