import java.util.Scanner;
 
class Media {
    public static void main(String[] args) {
        float acumulador = 0;
        int contador = 0;
        Scanner scanner = new Scanner(System.in);
        while (true) {
            System.out.println("Insira um valor: ");
            String dado = scanner.nextLine();
            if (dado.equals("N")) break;
            try {
            	float valor = Float.parseFloat(dado);
                contador++;
                acumulador += valor;
            } catch (NumberFormatException ex) {
                System.out.println("Valor inválido digite um válido");
            }
         }
        System.out.println("Média: "+ acumulador / contador);
    }
}
 
//https://pt.stackoverflow.com/q/153379/101

aW1wb3J0IGphdmEudXRpbC5TY2FubmVyOwoKY2xhc3MgTWVkaWEgewogICAgcHVibGljIHN0YXRpYyB2b2lkIG1haW4oU3RyaW5nW10gYXJncykgewogICAgICAgIGZsb2F0IGFjdW11bGFkb3IgPSAwOwogICAgICAgIGludCBjb250YWRvciA9IDA7CiAgICAgICAgU2Nhbm5lciBzY2FubmVyID0gbmV3IFNjYW5uZXIoU3lzdGVtLmluKTsKICAgICAgICB3aGlsZSAodHJ1ZSkgewogICAgICAgICAgICBTeXN0ZW0ub3V0LnByaW50bG4oIkluc2lyYSB1bSB2YWxvcjogIik7CiAgICAgICAgICAgIFN0cmluZyBkYWRvID0gc2Nhbm5lci5uZXh0TGluZSgpOwogICAgICAgICAgICBpZiAoZGFkby5lcXVhbHMoIk4iKSkgYnJlYWs7CiAgICAgICAgICAgIHRyeSB7CiAgICAgICAgICAgIAlmbG9hdCB2YWxvciA9IEZsb2F0LnBhcnNlRmxvYXQoZGFkbyk7CiAgICAgICAgICAgICAgICBjb250YWRvcisrOwogICAgICAgICAgICAgICAgYWN1bXVsYWRvciArPSB2YWxvcjsKICAgICAgICAgICAgfSBjYXRjaCAoTnVtYmVyRm9ybWF0RXhjZXB0aW9uIGV4KSB7CiAgICAgICAgICAgICAgICBTeXN0ZW0ub3V0LnByaW50bG4oIlZhbG9yIGludsOhbGlkbyBkaWdpdGUgdW0gdsOhbGlkbyIpOwogICAgICAgICAgICB9CiAgICAgICAgIH0KICAgICAgICBTeXN0ZW0ub3V0LnByaW50bG4oIk3DqWRpYTogIisgYWN1bXVsYWRvciAvIGNvbnRhZG9yKTsKICAgIH0KfQoKLy9odHRwczovL3B0LnN0YWNrb3ZlcmZsb3cuY29tL3EvMTUzMzc5LzEwMQ==

OAo0CjUKNgpOCg==

8
4
5
6
N