GoFibonacciClosure

package main

import "fmt"

// fibonacci is a function that returns
// a function that returns an int.
func fibonacci() func() int {
	accum1 := 1
	accum2 := 0
	return func() int {
		accum := accum1 + accum2
		accum1 = accum2
		accum2 = accum
		return accum
	}
}

func main() {
	f := fibonacci()
	for i := 0; i < 10; i++ {
		fmt.Println(f())
	}
}