Tour of Go 2.0

Stacking defers

Multiple defer calls stack up. When the function returns, they execute in last-in, first-out order — like unwinding a stack.

This is intentional. It mirrors the natural way resources are acquired and released: if you open A, then B, you close B first, then A. defer makes that order automatic.

Try it — run the example and watch the numbers count down from 9 to 0.

To dig deeper into defer, check out the blog post on defer, panic, and recover.

main.go ▶ Run in Playground 
package main

import "fmt"

func main() {
	fmt.Println("counting")

	for i := 0; i < 10; i++ {
		defer fmt.Println(i)
	}

	fmt.Println("done")
}