learn/golang-learn/42-closure/closure.go

package main

import "fmt"

func outer() func() int {
	count := 0
	return func() int {
		count++
		return count
	}
}

func main() {
	counter := outer()
	fmt.Println(counter())
	fmt.Println(counter())
	fmt.Println(counter())

	anotherCounter := outer()
	fmt.Println(anotherCounter())
	fmt.Println(anotherCounter())
}