Introduction - Swift

Swift is  a new programming language for ios and OS X apps that builds on the best of C and Objective -C , without the constraints of C compatibility. Swift adopts safe programming patterns and adds modern features to make programming easier, more flexible. Swift's clean slate, backed by the mature and much-loved Cocoa and Cocoa Touch frameworks, is an opportunity to reimagine how software development works.
Apple laid the foundation for Swift by advancing our existing compiler, debugger, and framework infrastructure. We simplified memory management with Automatic Reference Counting(ARC). Objective C itself evolved to support blocks, collection literals and moduls,enabling framework adoption of modern language technologies without disruption.

Swift feels familiar to Objective C developers. It adopts the readability of Objective C's named parameters and the power of Objective C's dynamic object model. It provides seamless access to existing Cocoa framework and mix-and-match interoperability with Objective C code. Building from this common ground , Swift introduces many new features and unifies the procedural and object oriented portions of the language.

Swift is friendly to new programmers , It is the first industrial quality systems programming language that is expressive as and enjoyable as a scripting language. It supports playgrounds an innovative feature that allows programmers to experiment with swift code and see the result immediately , without the overhead of building running an app.

Swift combines the best in modern language thinking with wisdom from the wider Apple engineering culture. The compiler is optimized for performance, and the language is optimized for development, without compromising on either. It's designed to scale from "hello ravi" to an entire OS. All this makes Swift a sound future investment for developers and for Apple.

Swift is a fantastic way to write ios and OSX apps, and will continue to evolve with new features and capabilities. Our goal for swift are ambitious . We can't wait to see what you create with it.


The Swift programming language has the following goals:
 
SafetySwift is designed to be a safe language. Many of the pitfalls of C, such as accidentally working with null pointers, are much harder to encounter. Swift is very strongly typed, and objects aren’t allowed to be null except under very specific circumstances.
 
Modernity
Swift contains a large number of modern language features designed to make it easy to express the logic of your code. These include pattern-matching switch statements, closures and the concept of all values being objects that you can attach properties and functions.

Power
Swift has access to the entire Objective-C runtime, and is seamlessly bridged to Objective-C’s classes. This means that you can use Swift right away to write full ios and OS X apps—you don’t need to wait for anyone to port any features from Objective-C to Swift. And if you’ve never used Objective-C, then you don’t need to worry about Objective-C! You can do everything you need to develop for Apple platforms using Swift.