fibonacci practice

gistfile1.go

package main

import "fmt"
//import "strconv"

var known = map[int] int{0:0, 1:1}

func fibo(n int) (result int) {
        if value, ok := known[n]; ok {
                result := value
                return result
        }   
        result = fibo(n - 1) + fibo(n - 2)
        known[n] = result
        return result
}

func main() {
        fmt.Println(fibo(300))
}