Loops do not keep values

Question

Hello! I am trying to develop a simple program that does an automatic accounting calculation, however, the condition within the for(while, while, if / Else, either) does not maintain its values. The repetition is executed 12~13 times and in all of them the output value is not changed. Because exactly the values within the loops are zeroed and displayed as if only one account had been made?

public static void main(String[] args) 
    {
      int x;
      double percentual=0.005, ValorSaida, ValorPercentual=0;
      x=Integer.parseInt(JOptionPane.showInputDialog("Digite o valor depositado mensalmente"));

      for(int meses=0; meses<=12; meses++)
      {  

       ValorPercentual=x*percentual;
       ValorSaida=x+ValorPercentual;
       JOptionPane.showMessageDialog(null, ""+ValorSaida+" "+ValorPercentual);

      }     


    }

Answer 1

Every time the code executes the loop, it under-writes the values try so:

public static void main(String[] args) 
    {
      int x;
      double percentual=0.005, ValorSaida, ValorPercentual=0;
      x=Integer.parseInt(JOptionPane.showInputDialog("Digite o valor depositado mensalmente"));

      for(int meses=0; meses<=12; meses++){  

          ValorPercentual += x*percentual;
          ValorSaida += x+ValorPercentual;

      }     
      JOptionPane.showMessageDialog(null, ""+ValorSaida+" "+ValorPercentual);

    }

You have to sum the values --> with the +=