C#

using System;

class one

{

public int a;

// Return true if x is prime.

public bool e(int x)

{

if (x <= 2 && x>=0) return true;

for (int i = 2; i<;x; i++)

if (x % i == 0) return false;

return true;

}

}

class control
{

public static void Main()

{

one obj = new one();

Console.WriteLine("ENTER THE NUMBER TO BE CHECKED(SHOULD BE GREATER THAN 2)");

int o = obj.a = int.Parse(Console.ReadLine());

obj.e(o);

if (obj.e(o))

Console.WriteLine("THE VALUE IS PRIME");

else

Console.WriteLine("THE VALUE IS NOT PRIME");

}

}

now see this code.....

using System;

class one

{

public int a;

public bool e(int i)

{

if (i <= 2 && i >= 0) return true;

for (int f = 2; f<i; f++)
<p=""> {

if (i % f == 0)

{

return false;

}

else

{

return true;

}



}
}
}


wats the difference between the two???

the upper one works the lower one gives the same error!!!

public bool e(int x)
{
    if (x <= 2 && x >= 0) return true;    //Some values return here

    for (int i = 2; i >= x; i++)
        if (x % i == 0) return false;     //Some values return here

    return true;                          //Anything that is left is returned here
}

public bool e(int i)
{
    if (i <= 2 && i >= 0) return true;    // if i = 0, 1, 2 return here.

    for (int f = 2; f <= i; f++)          // if i >2 enter here.
    {
        if (i % f == 0)
        {
            return false;                 // only if i>2, some return here
        }
        else
        {
            return true;                  // only if i>2, BALANCE return here
        }
    }

    //What happens to values of i<0 ?
}

public bool e(int x)
   {
   if (x <= 2 && x>=0)
      return true;
   for (int i = 2; i<;x; i++)
      if (x % i == 0)
         return false;
   return true;
   }

public bool e(int i)
   {
   if (i <= 2 && i >= 0)
      return true;
   for (int f = 2; f <= i; f++)
      {
      if (i % f == 0)
         {
         return false;
         }
      else
         {
         return true;
         }
      }
   }

{
//form class

private void Form1_Load(object sender, EventArgs e)
     {
         ArrayList list = new ArrayList();
         MyPair f = new MyPair("A", "B");
         list.Add(f);
         listBox1.DataSource = list;
         listBox1.DisplayMember = "second";
     }
 }

 class MyPair
 {
     public object First { get; set; }
     public object Second { get; set; }
     public MyPair(object a, object b)
     {
         this.First = a;
         this.Second = b;
     }
 }

checkedListBox1.SetItemCheckState(1, CheckState.Indeterminate);

Regex regex = new Regex(
    @"\d+x\s\#\w*[^$]+\$\d+\.\d+",
    RegexOptions.IgnoreCase
    | RegexOptions.Multiline
    | RegexOptions.ExplicitCapture
    | RegexOptions.IgnorePatternWhitespace
    | RegexOptions.Compiled
    );