/*
C# Programming Tips & Techniques
by Charles Wright, Kris Jamsa

Publisher: Osborne/McGraw-Hill (December 28, 2001)
ISBN: 0072193794
*/

namespace nsArea
{
    using System;
    public class Area
    {
        static public void Main ()
        {
            double Area;
            int Radius = 42;
            GetArea (Radius, out Area);
            Console.WriteLine ("The area of a circle with radius {0} is {1}",
                                Radius, Area);
        }
        static void GetArea (int radius, out double area)
        {
            const double pi = 3.14159;
            area = pi * radius * radius;
        }
    }
}

           
         
     

   
 
public class Values{
    static void Main( ) {
       int myInt = 7;
       System.Console.WriteLine("Initialized, myInt: {0}", myInt);
       myInt = 5;
       System.Console.WriteLine("After assignment, myInt: {0}",myInt);
    }
 }

           
         
     

   
 

using System; 
 
public class Example2DemonstratesVariables {   
  public static void Main() {   
    int x; 
    int y; 
  
    x = 10;
  
    Console.WriteLine("x contains " + x);   
    y = x / 2;  
  
    Console.Write("y contains x / 2: ");  
    Console.WriteLine(y);  
  }   
}


           
         
     

   
 

       

using System;

public class Comparison
{
   public static void Main( string[] args )
   {
      int number1; 
      int number2; 

      Console.Write( "Enter first integer: " );
      number1 = Convert.ToInt32( Console.ReadLine() );

      Console.Write( "Enter second integer: " );
      number2 = Convert.ToInt32( Console.ReadLine() );

      if ( number1 == number2 )
         Console.WriteLine( "{0} == {1}", number1, number2 );

      if ( number1 != number2 )
         Console.WriteLine( "{0} != {1}", number1, number2 );

      if ( number1 < number2 )
         Console.WriteLine( "{0} < {1}", number1, number2 );

      if ( number1 > number2 )
         Console.WriteLine( "{0} > {1}", number1, number2 );

      if ( number1 <= number2 )
         Console.WriteLine( "{0} <= {1}", number1, number2 );

      if ( number1 >= number2 )
         Console.WriteLine( "{0} >= {1}", number1, number2 );
   } 
}
     
         
     

   
 

using System;

public class Product {
    public static void Main(string[] args) {
        int x;
        int y;
        int z;
        int result;

        Console.Write("Enter first integer: ");
        x = Convert.ToInt32(Console.ReadLine());

        Console.Write("Enter second integer: ");
        y = Convert.ToInt32(Console.ReadLine());

        Console.Write("Enter third integer: ");
        z = Convert.ToInt32(Console.ReadLine());

        result = x * y * z;

        Console.WriteLine("Product is {0}", result);
    }
}
           
         
     

   
  

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

class Program {
    static void Main(string[] args) {
        Console.WriteLine(12.GetHashCode());
        Console.WriteLine(12.Equals(23));
        Console.WriteLine(12.GetType().BaseType);
        Console.WriteLine(12.ToString());
        Console.WriteLine(12); // ToString() called automatically.

    }
}

   
     

   
  

using System;

class UnaryOpsApp
{
    static void Main(string[] args)
    {
        int a;
        a = -42;
        Console.WriteLine("{0}", a);
    }
}