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of the OS, Big Nerd Ranch should be the first contact in your virtual Rolodex under Mac/ iPhone consulting. It's no exaggeration to say that Aaron Hillegass literally wrote the book on Cocoa programming, and you couldn't possibly do better than to bring his and his team's expertise to bear on your application. I've yet to work with a consulting firm that is as competent and communicative as Big Nerd Ranch. Simply put, these guys deliver.”

-- Glenn Zelniker

CEO

Z-Systems Audio Engineering

www.z-sys.com

“We turned to Big Nerd Ranch to develop the Teavana concept into an iPhone app. More than just a developer, they partnered with us to make the app better than we could have imagined alone. The final app was bug-free and functioned exactly as expected. I would definitely recommend Big Nerd Ranch and can't speak highly enough about their work.”

-- Jay Allen

VP of Ecommerce

Teavana Corporation

www.teavana.com

Software: Finely-crafted Applications

Big Nerd Ranch is a leading developer of downloadable mobile and desktop Mac applications. Several of our most intriguing iPhone and desktop apps are available for purchase in the iTunes store.

Mobile Applications

Smartphones have started to take over the mobile phone market. Since the inception of the iPhone, we have created dozens of apps for our clients and now have a roster of our own applications including games, utilities, music and educational apps. As an ever-evolving frontier of technology, Big Nerd Ranch is committed to staying ahead of the curve.

Mobile Apps

The world has gone mobile. If your company doesn't have a mobile application, you are behind the curve. As of early 2011, the iTunes app store has grown to nearly 400,000 apps and the Android market has climbed to more than 250,000 applications. Google has unveiled its Android platform with an app store of its own and dozens of smartphone manufacturers have announced Android-powered devices. RIM has launched App World, Palm has its Palm Store, Nokia launched Ovi (its online store) and Microsoft has unveiled Windows Marketplace.

While still leading the way, the iOS market has put up some staggering statistics:

Total iOS app store downloads: 10.3 billion

iPhone apps are being downloaded at a rate of 30 million per day.

As of early 2011, when the app store hit 10 billion downloads, it did so in half the time (31 months versus 67 months) that it took for songs in the iTunes store to hit the same mark.

The average number of apps downloaded for iPhone/iPad/iPod touch is currently at more than 60.

Books: The Big Nerd Ranch Guide Series

At Big Nerd Ranch, our philosophy and our passion for education extends to our books. Visit www.bignerdranch.com/books for Big Nerd Ranch books currently available.

Contact the Big Nerd Ranch

Visit us online at www.bignerdranch.com/.

For a Big Nerd Ranch on-site training proposal, please contact us at 404.478.9005.

Table of Contents

I. Getting Started

1. You and This Book

C and Objective-C

How this book works

How the life of a programmer works

2. Your First Program

Installing Apple’s developer tools

Getting started with Xcode

Where do I start writing code?

How do I run my program?

So what is a program?

Don’t stop

II. How Programming Works

3. Variables and Types

Types

A program with variables

Challenge

4. if/else

Boolean variables

else if

For the More Curious: Conditional (ternary) operator

Challenge

5. Functions

When should I use a function?

How do I write and use a function?

How functions work together

Local variables, frames, and the stack

Recursion

Looking at the frames in the debugger

return

Global and static variables

Challenge

6. Numbers

printf()

Integers

Tokens for displaying integers

Integer operations

Floating-point numbers

Tokens for displaying floating-point numbers

Functions for floating-point numbers

Challenge

7. Loops

The