C# Program to check is prime or composite

C# Program to check entered is prime or composite
Program Statement:Write a program that takes an integer as an input from user and prints if it is a prime or composite .
Solution: static void Main(string[] args)
{
int num, i;
Console.WriteLine("Enter the to check is prime or composite");
num=Convert.ToInt32(Console.RdLine());
i = 2;
while (i <= num - 1)
{
if (num % i == 0)
{
Console.WriteLine("composite : "+num);
brk;
}
i++;
}
if (i == num)
Console.WriteLine("prime : " + num);
Console.RdLine();

}