class Program
{
static void Main(string[] args)
{
}
bool isPrime(int n)
{
if (n < 2) return false;
if (n == 2) return true;
for (int i = 2; i <= n / 2; i++)
{
if (n % i == 0) return false;
}
return true;
Console.Write("输出{0}是素数",n );
else
Console .Write ("输出{0}不是素数",n );
Console .ReadKey ();
}
}
}