The practice of defer on Golang

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Golang defer how to say. The effect is after the function return. Before the function is closed. Keywords to execute in order of filo

On the code:

 PackageMainImport (    "FMT") Func main () {//A ()FMT. Println (c ())//B ()//FMT. Println (d ())}func C () (Iint) {defer func () {i++} () defer FMT. Println ("This:", i)return1}func A () {i:= 0defer FMT. PRINTLN (i) I= i + 1}func B () {var whatever [5]struct{} forI: =Range Whatever {//defer func () {fmt. Println (i)} ()Defer func (nint) {fmt. PRINTLN (N)} (i)}}func D () (Iint) {defer FMT. Println ("Sdad")    return1}

Return of Function C ():

this: 02

Return of Function A ():

0

Return of Function B ():

43210

Return of Function D ():

Sdad1

And then to figure out whether it was executed before or after return.

 Package Main Import (    "FMT") Func main () {    test ()}func test() (int, error) {    defer FMT. Println ("defer")    return to FMT. Println ("Return")}

The output is:

return defer

Enlightened.. Is the one that executes after return.