// Chapter 20 example: ask again until the answer is in range.
// Run with: go run exercises/20/02-validate.go

package main

import (
	"bufio"
	"fmt"
	"os"
	"strconv"
	"strings"
)

func main() {
	reader := bufio.NewReader(os.Stdin)

	var level int
	for {
		fmt.Print("Level (1 to 99): ")
		text, _ := reader.ReadString('\n')
		level, _ = strconv.Atoi(strings.TrimSpace(text))
		if level >= 1 && level <= 99 {
			break
		}
		fmt.Println("That is not a level from 1 to 99.")
	}

	fmt.Println("Level set to", level)
}