Texto reverso em golang

package main

import "fmt"

func main() {
    s := "Hello, playground"
    fmt.Println(s)

    fmt.Println(Reverse(s))
    fmt.Println(ReverseUsingRunes(s))

}

func Reverse(s string) string {
    var reverse string
    for i := len(s)-1; i >= 0; i-- {
        reverse += string(s[i])
    }
    return reverse 
}

func ReverseUsingRunes(s string) string {
    runes := []rune(s)
    for i, j := 0, len(runes)-1; i < j; i, j = i+1, j-1 {
        runes[i], runes[j] = runes[j], runes[i]
    }
    return string(runes)
}