public static Boolean isPrimeNumber(int n) { Boolean flag = true; for (int i = Convert.ToInt32(Math.Sqrt(n)); i >= 2; i--) { if (n % i == 0) { flag = false; break; } } return flag; }
static void Main(string[] args) { for (int i = 100; i <= 200; i++) { if (isPrimeNumber(i)) Console.WriteLine(i); } }