reverse string (https://leetcode.com/problems/reverse-string/description/)

main.go

package main

import (
	"fmt"
)

func main() {
	str := "hello"
	for _, c := range str {
		fmt.Println(c)
	}
}

func reverseString(s string) string {
	runes := []rune(s)
	for l, h := 0, len(runes)-1; l < h; l, h = l+1, h-1 {
		runes[l], runes[h] = runes[h], runes[l]
	}
	return string()
}