Compute the area of a circle

   
/*
C#: The Complete Reference 
by Herbert Schildt 

Publisher: Osborne/McGraw-Hill (March 8, 2002)
ISBN: 0072134852
*/
// Compute the area of a circle. 
  
using System;  
   
public class ComputeCircle {   
  static void Main() {   
    double radius; 
    double area; 
 
    radius = 10.0; 
    area = radius * radius * 3.1416; 
 
    Console.WriteLine("Area is " + area); 
  }   
}

1.	the differences between int and double
2.	Implement the Pythagorean Theorem
3.	Talking to Mars: double value calculation
4.	converts Fahrenheit to Celsius
5.	Epsilon, PositiveInfinity, NegativeInfinity, MaxValue, MinValue
6.	double number format: 0:C, 0:D9, 0:E, 0:F3, 0:N, 0:X, 0:x
7.	Format double value
8.	Get Decimal Places
9.	Automatic conversion from double to string
10.	An int, a short, a float, and a double are added together giving a double result.
11.	Test to see if a double is a finite number (is not NaN or Infinity).
12.	Double.Epsilon Field represents the smallest positive Double value that is greater than zero.
13.	Availible Double Range
14.	Truncates the specified double.
15.	Is Nearly Equal
16.	Shifts the given value into the range

Compute the area of a circle : double « Data Types « C# / C Sharp

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