Prime

Code

public class Prime
{
	public static void main( String[] args )
	{
		for (int num = 2; num < 20; num++)
		{
			if ( ifPrime(num) == true)
            {
                System.out.println( num + " < ");
            }
            else
            {
                System.out.println( num );
            }
		}
	}

	public static boolean ifPrime(int n)
	{
		for (int i = 2;i < n;i++)
		if (n%i==0) 
        {
            return false;
        }

		return true;
	}

}

Prime