CS101 Post Lab 4.1

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. Discuss one difference between JavaScript and HTML that suggests only
JavaScript is a programming language.

Similarity - both are human-readable ways to tell a computer what to do
Difference - JavaScript can perform calculations, HTML can't

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.

Television
Input - signal in, remote control commands
Output - picture out, volume and channel changes

CD player
Input - button presses
Output - music starts, stops, rewinds, etc...

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

The alert boxes are outputs.
The currency converter has an input - the amount of currency that you wish to convert.  The output
is the converted amount.