go_workshop/chapter_05/exercise_5.07/main.go

package main

import "fmt"

func main() {

  counter := 4

  x := decrement(counter)
  fmt.Println(x())
  fmt.Println(x())
  fmt.Println(x())
  fmt.Println(x())

  fmt.Println("counter:", counter)

}

func decrement(i int) func() int {

  return func() int {
    i--
    return i
  }

}