Go Exercises: Fibonacci

Exercise: Fibonacci closure

package main

import "fmt"

var prev, curr int
// fibonacci is a function that returns
// a function that returns an int.
func fibonacci() func() int {
	inc := 1
	return func() int {
		prev = curr
		curr = inc
		inc = prev+curr
		return prev
	}
}

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