tour of go #46

fib.go

package main

import "fmt"

// fibonacci is a function that returns
// a function that returns an int.
func fibonacci() func() int {
	r := 1
	prev := 0
	return func() int{
		prev, r = r, r + prev
		return r
	}
}

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