C#

BillWoodruff wrote:

int remainder = 5 % 2; // return 3

BillWoodruff wrote:

how much your intellect is so far ahead of mine.

int num1;

Console.WriteLine("Accept number:");
num1 = Convert.ToInt32(Console.ReadLine());
if (num1 == 0 || num1 == 1)
{
    Console.WriteLine(num1 + " is not prime number");
    Console.ReadLine();
}
else
{
    for (int a = 2; a <= num1 / 2; a++)
    {
        if (num1 % a == 0)
        {
            Console.WriteLine(num1 + " is not prime number");
            return;
        }

    }
    Console.WriteLine(num1 + " is a prime number");
    Console.ReadLine();
}

Console.Write("Enter a Number : ");
           int num;
           num = Convert.ToInt32(Console.ReadLine());
           int k;
           k = 0;
           for (int i = 1; i <= num; i++)
           {
               if (num % i == 0)
               {
                   k++;
               }
           }
           if (k == 2)
           {
               Console.WriteLine("Entered Number is a Prime Number and the Largest Factor is {0}",num);
           }
           else
           {
               Console.WriteLine("Not a Prime Number");
           }
           Console.ReadLine();

private string getID = @"'\d+'";

private Regex rxGetID;

private char[] trimQuote = new[] {'\''};

private int? htmlToInt(string match)
{
    rxGetID = new Regex(getID, RegexOptions.Compiled);

    string result = rxGetID.Match(match).Value.Trim(trimQuote);

    int intResult;

    return (Int32.TryParse(result, out intResult))
       ? intResult
       : (int?) null; // note the weird, but required, cast here
}

// test
private void Test()
{
    rxGetID = new Regex(getID,RegexOptions.Compiled);

    int? result = htmlToInt("<li> ID='45'");

    if (result != null)
    {
        // good to go
    }
    else
    {
        // throw error ?
    }
}      

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