Reversed String

package main

import (
    "bufio"
    "os"
    "strings"
)

const minInputSize = 5

func main() {
    print("input: ")
    input, err := bufio.NewReader(os.Stdin).ReadString('\n')
    input = strings.TrimSuffix(input, "\n")
    if err != nil {
        println(err.Error())
        return
    }
    if len(input) < minInputSize {
        println("input must be greater than", minInputSize)
        return
    }
    print("reversed: ")
    for index := (len(input) - 1); index >= 0; index-- {
        print(string(input[index]))
    }
    println()
}