ADO 04 - 03

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import java.util.Scanner;

class Main {

public static void main(String[] args) {
    Scanner ler = new Scanner(System.in);
System.out.println("====Programa da Média====");
System.out.println("Informe a nota 1");
    double n1 = ler.nextDouble();

System.out.println("Informe a nota 2");
    double n2 = ler.nextDouble();

System.out.println("Informe a nota 3");
    double n3 = ler.nextDouble();

    double mmm = media (n1, n2, n3);

System.out.println("A média é " + mmm); 

}

public static double media (double n1, double n2, double n3) {
    double m = (n1+n2+n3)/3;
    return m;

}

}

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FLUXOGRAMA: https://snipboard.io/VckfPh.jpg