What is a guard statement in Swift?

What is a guard statement in Swift?

A guard statement in Swift is used to transfer program control out of a scope if a condition isn't met. It's often used for early exits.

Can you give me an example of how to use a guard statement?

Sure! Here's a simple example:

func validateAge(age: Int?) {
    guard let unwrappedAge = age, unwrappedAge >= 18 else {
        print("You must be at least 18 years old.")
        return
    }
    print("Access granted. Your age is \(unwrappedAge).")
}

What are the benefits of using guard statements?

Guard statements improve code readability and reduce nesting by handling conditions that would otherwise require multiple if statements.

Are there any limitations to using guard statements?

Yes, guard statements can only be used within functions, methods, or closures, and they must exit the current scope if the condition fails.