How do I use guard let in Swift?

How do I use guard let in Swift?

In Swift, guard let is used for optional binding. It allows you to safely unwrap optionals and exit the current scope if the optional is nil.

Can you give me an example of using guard let?

Sure! Here's a simple example:

func processValue(_ value: Int?) {
    guard let unwrappedValue = value else {
        print("Value is nil")
        return
    }
    print("The value is \(unwrappedValue)")
}

This function checks if value is nil and safely unwraps it.

What happens if the value is nil?

If the value is nil, the code inside the else block will execute, and the function will return early without executing the rest of the code.

Is guard let better than if let?

It depends on the context! guard let is often preferred for early exits, making the code cleaner, while if let is useful for conditional execution.