What are optional types in Swift?

What are optional types in Swift?

Optional types in Swift are a way to indicate that a variable can hold a value or be nil (no value). They are defined using a question mark (?).

Can you give me an example of how to use optional types?

Sure! Here's an example: var name: String? means name can hold a string or be nil. You can safely unwrap it using if let.

What happens if I try to access a nil optional?

If you try to access a nil optional without unwrapping it, your app will crash. Always check for nil before accessing.

Are there any best practices for using optionals?

Yes! Use optionals when a value may be absent, avoid force unwrapping, and prefer using optional binding to safely handle them.