can somebody please explain this code ? im not understanding fully how the code works ...

Question

static int Pow(int x, int y=2)
{
int result = 1;
for (int i = 0; i < y; i++)
{
result *= x;
}
return result;
}
static void Main(string[] args)
{
Console.WriteLine(Pow(6));

Console.WriteLine(Pow(3, 4));
}