Swift 2.0 Learning Notes-My first line of Swift code

Swift 2.0 Learning notes-my first line of Swift code

when I first saw the following code, I petrified, what is the code? The words spelled out?

Import Foundation   

   var str = "Hello World"        

print (str)   

Dizzy, okay, keep your head down and look down, oh, yes.

First sentence:import Foundation

Represents the introduction of the foundation frame.  

What is foundation frame?

Foundation is the framework for OS X and IOS application development, which includes basic classes such as numbers, strings, arrays, dictionaries, and so on.

CocoaFramework isOS Xthe development requires several frameworks which include:AppKitand theFoundationFramework. UIKitFramework isIosgraphical user interface development requires a framework that includes common views and view controllers.

var str = "Hello World"

declaration Str variable, var denotes declaring a variable.  

third sentence:print (str)

Print (_:) is a function that can output variables or constants to the console.

Swift 2.0 Learning Notes-My first line of Swift code