2

3

4

5

6

func GetMsg(i int) (r string) {

    fmt.Println(i)

    r = "hi"

    return r

}

2

3

4

5

6

7

func GetMsg(i int) (r string, err string) {

    fmt.Println(i)

    r = "hi"

    err = "no err"

    return r,err

}

func ReadFile(filePath string)(){

    file.Open(filePath)

    defer file.Close()

    if true {

        file.Read()

    } else {

        return false

    }

}

package main

import "fmt"

func main() {

    f()

    fmt.Println("Returned normally from f.")

}

func f() {

    defer func() {

        if r := recover(); r != nil {

            fmt.Println("Recovered in f", r)

        }

    }()

    fmt.Println("Calling g.")

    g(0)

    fmt.Println("Returned normally from g.")

}

func g(i int) {

    if i > 3 {

        fmt.Println("Panicking!")

        panic(fmt.Sprintf("%v", i))

    }

    defer fmt.Println("Defer in g", i)

    fmt.Println("Printing in g", i)

    g(i + 1)

}

2

3

4

5

6

7

8

9

10

11

12

Calling g.

Printing in g 0

Printing in g 1

Printing in g 2

Printing in g 3

Panicking!

Defer in g 3

Defer in g 2

Defer in g 1

Defer in g 0

Recovered in f 4

Returned normally from f.