sum in golang

sum.go

package main

import "fmt"

func sum(numbers []int) int {
  if len(numbers) == 0 {
    return 0
  } else {
    return numbers[0] + sum(numbers[1:])
  }
}

func main() {
  fmt.Printf("result: %d", sum([]int { 1, 2, 3, 4 }))
}