February 2008
Beginner
416 pages
9h 53m
English
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Chapter 7. Working with Functions
After reading this chapter, you'll be able to
Understand the purpose of functions in JavaScript.
Define your own functions.
Call functions and receive data back from them.
Understand some of the built-in functions in JavaScript.
What's in a Function?
A JavaScript function is a collection of statements, either named or unnamed, that can be called from elsewhere within a JavaScript program. Functions can accept arguments or input values that are passed into the function. Within a function, those arguments passed into the function can be acted upon and then passed back out of the function through a return value.
Functions are perfect for when you have something that needs to happen multiple times within a program. Rather ...
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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.