What is difference between single and double ? in Swift?
Posted On: Jun 13, 2024
Difference between single and double ? in Swift:
Single ? in Swift is used to denote an optional value either contains a value or contains nil to indicate that the value is missing.
double ?? in swift is called nil coalescing operator that finds if optional has no value then it uses a default value.
Related Questions
Subscribe Our NewsLetter
Never Miss an Articles from us.
Recent Articles
Featured Categories
- Common Interview Questions
- Python Flask Interview Questions
- NoSQL Interview Questions
- jQuery Interview Questions
- C Programming Interview Questions
- AngularJs Interview Questions
- Node JS Interview Questions
- JavaScript Interview Questions
- Core Java Interview Questions
- HTML Interview Questions
- Laravel Interview Questions
- Wordpress Interview Questions
- PHP Interview Questions
Swift Interview Questions
What is IOS Swift?
Swift is an advanced language for iOS development, known for its concise and expressive syntax. It enables fast-running software and is used for developing iOS and OS X applications, making it ideal f..
Swift Interview Questions
What is Dictionary in Swift?
In Swift, key-value pairs allow for efficient data storage and retrieval, functioning similarly to hash tables in other programming languages. Accessing values is straightforward by using the correspo..
Swift Interview Questions
Explain Enum in Swift?
In Swift, enums define a common type for a group of related values, enabling type-safe handling within your code. Essentially, an enum groups various related values under the same umbrella, facilitati..