{infiniteZest}
// Articles. Tutorials. Utilities.
Home  |   Search  |   Login  
Categories Skip Navigation Links
New / All
AJAX
Apple
ASP.NET
.NET
Git
Google / Android
Python / IronPython
Miscellaneous
SQL Server
Test: Swift - Introduction to Optionals

2. How is the no-value state in Swift represented as?



Results
Congratulations! Correct Answer.
You Answered: None. If you took the test, your answer will show up here.
Correct Answer: nil
Explanation
In Swift, a no-value state (in case of Optionals) is represented as nil. In Objective-C, 0 can be used to represent the reference of class variable. It is not the same in Swift.
Take the Test
Take the complete test on this topic. You will be able to review answers to questions and get a test score.

Take the Test


Question 2 of 5


Test is Based on this Article
icon-swift-article.jpg
Tags: optionals, swift
This article talks about the purpose of Optionals in Swift and how to declare them in your code.
icon-swift-test.jpg
Tags: optionals, swift
This is a test on basic concepts of Optionals in Swift.

More Articles With Similar Tags
icon-swift-article.jpg
This article talks about unwrapping the optionals in Swift implicitly and the circumstances where you would use this functionality.
icon-swift-article.jpg
This article discusses the safer ways of unwrapping an optional in Swift that includes Optional Binding.
icon-swift-article.jpg
This article talks about the Nil Coalescing Operator (??) in Swift.
icon-swift-article.jpg
This article talks about optional chaining in swift where multiple optionals can be chained together and fail gracefully by returning nil when one of them is nil.
icon-swift-article.jpg
Summary of three operators (?, !, ??) used in optionals in Swift.
                                                                                                                                                                                                             
About  Contact  Privacy Policy  Site Map