Tour of Go (http://tour.golang.org) fibonacci with closures

fib.go

package main

import "fmt"

// fibonacci is a function that returns
// a function that returns an int.
func fibonacci() func(int) int {
    fib := make([]int, 100)
    fib[0] = 0
    fib[1] = 1
    return func(n int) int {
        if n < 2 {
            return n
        }
        fib[n] = fib[n-1]+fib[n-2]
        return fib[n]
    }
        
}

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