What is the defer statement in Go?

Can you explain what the defer statement does in Go?

The defer statement in Go is used to schedule a function call to be run after the function completes. It's often used for cleanup tasks.

Can you give me an example of how to use defer?

Sure! Here's a simple example:

func main() {
    defer fmt.Println("World")
    fmt.Println("Hello")
}

In this case, "World" will be printed after "Hello".

What happens if I have multiple defer statements?

If you have multiple defer statements, they are executed in LIFO (Last In, First Out) order. The last deferred function will run first.

Are there any performance considerations with using defer?

Yes, using defer can introduce a slight overhead due to the function call being scheduled. However, it's often negligible compared to the benefits of cleaner code.