April 2007
Intermediate to advanced
1728 pages
47h 51m
English
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Chapter 29. The Math, Number, and Boolean Objects
IN THIS CHAPTER
Advanced math operations
Number base conversions
Working with integers and floating-point numbers
The introduction to data types and values in Chapter 6's tutorial scratched the surface of JavaScript's numeric and Boolean powers. In this chapter, you look more closely at JavaScript's way of working with numbers and Boolean data.
Math often frightens away budding programmers; but as you've seen so far in this book, you don't really have to be a math genius to program in JavaScript. The powers described in this chapter are here when you need them—if you need them. So if math is not your strong suit, don't freak out over the terminology here.
An important point to remember about the objects described in this chapter is that (like string values and string objects) numbers and Booleans are both values and objects. Fortunately for script writers, the differentiation is rarely, if ever, a factor unless you get into some very sophisticated programming. To those who actually write the JavaScript interpreters inside the browsers we use, the distinctions are vital.
For most scripters, the information about numeric data types and conversions as well as the Math object are important to know.
Numbers in JavaScript
More powerful programming languages have many different kinds of numbers, each related to the amount of memory it occupies in the computer. Managing all these different types may be fun for some, but it gets in the way of quick ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.