fibonacci in go

fibo.go

package main

import "fmt"

// fibonacci is a function that returns
// a function that returns an int.
func fibonacci() func(int) int {
    return func(n int) int {
        a, b := 0, 1
        for i := 0; i < n; i++ {
          a, b = b, a + b
        }
        return a
    }
}

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