Console Permutation...!!

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;


class Program
{
      class Permutation
      {
            private void swap(ref char a, ref char b)
           {
                 if (a == b) return;

                 a ^= b;

                 b ^= a;

                 a ^= b;
           }

           public void setper(char[] list)
          {
                int x = list.Length - 1;

                go(list, 0, x);

          }

          private void go(char[] list, int k, int m)
          {
                int i;

                if (k == m)
               {
                     Console.Write(list);
                     Console.WriteLine(" ");
               }

               else

               for (i = k; i <= m; i++)
              {
                    swap(ref list[k], ref list[i]);
                    go(list, k + 1, m);
                    swap(ref list[k], ref list[i]);
              }
              Console.ReadLine();
        }
  }

  class Class1
  {
        static void Main()
        {
              Permutation p = new Permutation();

              string c = "123456";

              char[] c2 = c.ToCharArray();
              p.setper(c2);
        }
    }
}

Console Random Number 1-6...!!!

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace RandomNumber
{
    class Program
    {
           static void Main()
           {
                  Random();
                  Random();
                  Random();
                  Random();
                  Random();
                  Random();

           }

           static Random MyRandom = new Random();
           static void R()
           {
                  for(int i = 0; i < 600; i++)
                  {
                         double value;
                         double n = 0.5 + MyRandom.NextDouble() * 6.0-0.5;
                         value = Math.Round(n);
                         Console.WriteLine(value);
                   }
                   Console.ReadLine();
            }
     }
}

Program that emulates a Calculator ^^

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Calculation
{
    class CalculateNumber
    {
        int Number1, Number 2;
        char option;
        int Result;

        public void Number ()
        {
            Console.WriteLine("Enter the First Number");
            Number1 = Convert.ToInt32(Console.ReadLine());

            Console.WriteLine("Enter the Second nummber");
            Number2 = Convert.ToInt32(Console.ReadLine());

            Console.WriteLine("Main Menu");
            Console.WriteLine("1.Addition");
            Console.WriteLine("2.Subtraction");
            Console.WriteLine("3.Multiplication");
            Console.WriteLine("4.Division");

            Console.WriteLine("Enter the Operation you want to perform");
            option = Convert.ToChar(Console.ReadLine());

            switch (option)
            {
                case '1':
                    Result = Number1 + Number2;
                    Console.WriteLine("The result of addition is: {0}", Result);
                break;

                case '2':

                    Result = Number1 - Number2;
                    Console.WriteLine("The result of subtraction is: {0}", Result);
                break;

                case '3':
               
                    Result = Number1 * Number2;
                    Console.WriteLine("The result of multiplication is: {0}", Result);
                break;

                case '4':
               
                    Result = Number1 / Number2;
                    Console.WriteLine("The result of division is: {0}", Result);
                break;
                default:
                    Console.WriteLine("Invailid Option");
                break;
            }
           
            Console.ReadLine();

        }
    }
    class ClassMain
    {
        static void Main (string[] args)
        {
            CalculateNumber obj = new CalculateNumber();
            obj.Number();
        }
    }
}

Differences Between Java and C#

A.    Java Primitive Types

1.        Logical --- boolean

Logical values are represented using the boolean type,which takes one of two values : true or false.

Example :

boolean result = true;

This example is to declare a variable which named by "result" as boolean datatype, and give it true value.

2.        Textual --- char

This type is representative by single unicode.

You must enclose a char literal in single quotes(' ').

Example :

 'a'  // The letter a

 '\t'  // A tab

3.        Integral --- byte, short, int, and long

 It using decimal, octal, and hexadecimal.

 byte = 8 bits

 short = 16 bits

 int = 32 bits

 long = 64 bits

Example :

 2 // decimal for integer 2

 077 // 0 indicates an octal value

 0xBAAC // 0x indicates a hexadecimal value

4.        Floating Points --- float and double

 "double" is the datatype default.

 E or e  ==> add exponential value

 F or f ==> float

 D or d ==> double

Example :

 3.14

 6.02E23 ==> 23 after E has a positive value, equivalent with 6.02E+23

B. C# Primitive Types

Because C# represents all primitive data types as objects, it is possible to call an object method on a primitive data type.

Example :

        static void Main()

{

    int i = 10;

    object o = i;

    System.Console.WriteLine(o.ToString());

}

>>  Type of Data Type

-  Value Types

They directly content data. The example are char, int, and float, which can be used for storing alphabets, integers, and floating point numbers.

-  Reference Type

They contain a reference to the variables which are stored in memory. The example is string datatype.

Differences between Java and C# :

-   To compare string values in Java, 

developers need to call the equals method on a string type 

as the == operator compares reference types by default. 

In C#, developers can use the == or != operators to compare string values directly.

-   Java's boolean is called bool in C#.

-   C# supports unsigned in addition to the signed integer types. 

-   Java does not feature unsigned integer types.