December 2013
Intermediate to advanced
132 pages
1h 58m
English
Content preview from Objective-C Quick Syntax ReferenceBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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CHAPTER 7
Numbers
NSNumber
NSNumber is the class used in Objective-C to work with numbers. NSNumber gives you a way to turn floating point and integer values into object-oriented number objects. While you can’t use NSNumber objects in expressions, NSNumber objects become useful when complicated formatting is required.
NSNumber objects can be created with many different constructors, but the most common way you’ll see NSNumber objects created is with the @ symbol followed by a number.
NSNumber *num1 = @1;NSNumber *num2 = @2.25;
Sometimes you may want to use special constructors that are matched to numbers stored in a particular way.
NSNumber *num3 ...Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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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.