Exercise: Fibonacci Closure

gistfile1.go

//https://tour.golang.org/moretypes/22
package main
 
import "fmt"
 
// fibonacci is a function that returns
// a function that returns an int.
func fibonacci() func() int {
	a := 0
	b := 1
	return func() int {
		c := a + b
		a = b
		b = c
		return c
	}
}
 
func main() {
	f := fibonacci()
	for i := 0; i < 10; i++ {
		fmt.Println(f())
	}
}