Please check following code and tell what can be problem?

 import UIKit ;

var intVar:Int?=3;

 intVar = nil;

 var strVar:String;

 strVar = nil;

Compare the below code and what will result? import UIKit var rank:Dictionary = [1:'First', 2: 'Second', 3: 'Third']; rank.updateValue('Forth', forKey: 4);

On which tag background color for the page can be set?

In Swift, what's the correct way variables consist?

What is the need for having structures?

Select the most proper answer. import UIKit import AVFoundation … … … let r:AVAudioRecorder? do { r = try AVAudioRecorder(URL: soundFileURL, settings: rSettings) r.delegate = self r.meteringEnabled = true r.prepareToRecord() } catch let error as NSError { r = nil print(error.localizedDescription) }

Can Structures be type cast in Swift?

Output of this segment of code: var x = 0 for index in 1...5 { ++x } print('(x)')

Swift can compile alongside what other language?

Swift Type is used to group multiple values into a single compound value? For example:let compoundValue = (3, 5)

Symbol used like a tuple to access arguments in Abbreviated Swift Closure syntax?