Can you explain what it means to use the forced unwrapping operator in Swift and why it is dangerous?

In Swift, the force unwrap operator is denoted by an exclamation mark ! after an optional value. It is used to get the value from an optional, assuming it is not nil.

For example:

let optionalString: String? = "Hello"
let forcedString: String = optionalString! // force unwrapping

The danger is that if the optional is nil, the app will crash at runtime when force unwrapping. Therefore, ! should only be used when you are sure that the value is not nil.

It is safer to use optional binding with if let or guard let to prevent crashes.