test for defer

defer.go

func main() {
 fmt.Println(test1())
 fmt.Println(test2())
 fmt.Println(test3())
 fmt.Println(test4())

 return
}

func test1() (v int) {
 defer fmt.Println(v)
 return v
}

func test2() (v int) {
 defer func() {
  fmt.Println(v)
 }()
 return 3
}

func test3() (v int) {
 defer fmt.Println(v)
 v = 3
 return 4
}

func test4() (v int) {
 defer func(n int) {
  fmt.Println(n)
 }(v)
 return 5
}

answer is here:

0
0
3
3
0
4
0
5