What is the meaning of question mark ? in Swift?

Swift - Quiz(MCQ)

What is the meaning of question mark "?" in Swift?

used in loop declaration

used in function declaration

used in property declaration

used in parameter declaration

Correct Answer : used in property declaration

Explanation : In Swift, question mark "?" is used in property declaration. It tells the compiler that this property is optional. The property may hold a value or not.

Recently Updated in Swift Questions

What are the characteristics of Switch in Swift?

It supports any kind of data, and not only synchronize but also checks for equality

Switch statement must be exhaustive, which means that you have to cover all possible values for your variable

When a case is matched in switch, the program exits from the switch case and does not continue checking the next cases. So you donâ€™t need to explicitly break out the switch at the end of case

All of the above

Correct Answer : All of the above