using static System.Console;

​

public class Program {

    public static void Main()   {

        int []vetor =  { 1, 2, 3, 4, 5, 6, 7, 8, 10 };

        for (int i = 0; i < vetor.Length; i++ ) vetor[i] *= vetor[i];

        WriteLine($"{string.Join(", ", vetor)}.");

    }

}