JavaScript Design

Literals

The raw data that make up the root of data types are called “literals.” These are, in effect, literally what they represent themselves to be. Numbers, strings, and Boolean values make up the core set of literals in JavaScript. Little mystery exists with literals, but important differences exist between them.

Numbers

The fundamental data in most computer languages are numbers. Because JavaScript is weakly typed, all numbers are treated as floating-point, so you need not distinguish between integers and floating-point literals. All of the following values are treated as numeric literals:

223.48 
20 
0 
500.33 

When assigning numeric literals to names (identifiers), you simply write them in their raw form, with no required quotation marks ...