Array

int[] numbers = new int[3];
int[] numbers = new int[] { 10, 20, 30 };
int[] numbers = { 10, 20, 30 };
int[,] numbers = { {1, 2, 3}, {4, 5, 6} };

for(int i=0; i<numbers.GetLength(0); i++)
{
    for(int j=0; j<numbers.GetLength(1); j++)
    {
         output numbers[i, j];
    }
}

string[] names = {"A", "B", "C"};
foreach ( var name in names )
{
    output name;
}