JavaScript Absolute Beginner’s Guide

2. Values and Variables

In This Chapter

• Learn how to use values to store data

• Organize your code with variables

• Get a brief look at variable naming conventions

In JavaScript, every piece of data that you provide or use is considered to contain a value. In the example you saw from our introduction in the previous chapter, the words hello, world! might just be some words that you pass in to the alert function:

alert("hello, world!");

To JavaScript, these words and punctuation marks have a specific representation under the hood. They are considered values. You may not have thought much about that when you were typing those words in, but when you are in JavaScript country, every piece of data you touch is considered a value.

Now, why is knowing ...