Csharp/C Sharp by API/System/Math

Math.Abs

  
using System;
public class MainClass {
   public static void Main( ) {
      double epsilon   = 1.0e-9;
      double guess    = 11.0;
      double result   = 0.0;
      double value = 2;
      result = ((value / guess) + guess) / 2; 
      do {
            Console.WriteLine( "Guess Value  = {0}", guess  );
            Console.WriteLine( "Result Value = {0}", result );
            guess = result;
            result = ((value / guess) + guess) / 2;
      } while( Math.Abs(result - guess) > epsilon );
      Console.WriteLine("The approx sqrt of {0} is {1}", value, result );
    }
}

Math.Cos()

  
using System; 
 
public class Trigonometry {    
  public static void Main() {    
    Double theta;
     
    for(theta = 0.1; theta <= 1.0; theta = theta + 0.1) { 
      Console.WriteLine("Sine of " + theta + "  is " + 
                        Math.Sin(theta)); 
      Console.WriteLine("Cosine of " + theta + "  is " + 
                        Math.Cos(theta)); 
      Console.WriteLine("Tangent of " + theta + "  is " + 
                        Math.Tan(theta)); 
      Console.WriteLine(); 
    } 
 
  }    
}

Math.Min

  
using System;
public class MainClass {
    public static void Main() {
        int i = 5;
        Console.WriteLine("Math.Min(1,2) = {0}", Math.Min(i, 2.5F));
    }
}

Math.PI

  
using System;
using System.Data;

class Class1{
        static void Main(string[] args){
            Console.WriteLine(ConvertDegreesToRadians (180));
            Console.WriteLine(ConvertDegreesToRadians (90));
            Console.WriteLine(ConvertDegreesToRadians (30));
        }
    public static double ConvertDegreesToRadians (double degrees)
    {
      double radians = (Math.PI / 180) * degrees;
      return (radians);
    }  
}

Math.Round

  
using System;
public class MainClass {
    public static void Main() {
        Console.WriteLine(Math.Round(4.4));
        Console.WriteLine(Math.Round(4.5));
        Console.WriteLine(Math.Round(4.6));
        Console.WriteLine(Math.Round(5.5));
        Console.WriteLine(Math.Round(4.54, 1));
        Console.WriteLine(Math.Round(4.55, 1));
        Console.WriteLine(Math.Round(4.65, 1));
        Console.WriteLine(Math.Round(4.56, 1));
    }
}

Math.Sign

  
using System;
public class MainClass {
    public static void Main() {
        Console.WriteLine("Math.Sign(1) = {0}", Math.Sign(1));
        Console.WriteLine("Math.Sign(-1) = {0}", Math.Sign(-1));
        Console.WriteLine("Math.Sign(0) = {0}", Math.Sign(0));
    }
}

Math.Sin()

  
using System; 
 
public class Trigonometry {    
  public static void Main() {    
    Double theta;
     
    for(theta = 0.1; theta <= 1.0; theta = theta + 0.1) { 
      Console.WriteLine("Sine of " + theta + "  is " + 
                        Math.Sin(theta)); 
      Console.WriteLine("Cosine of " + theta + "  is " + 
                        Math.Cos(theta)); 
      Console.WriteLine("Tangent of " + theta + "  is " + 
                        Math.Tan(theta)); 
      Console.WriteLine(); 
    } 
 
  }    
}

Math.Sqrt

  
  
using System;  
class MainClass {     
  public static void Main() {     
    double s1 = 3.0; 
    double s2 = 4.0; 
    double hypot; 
 
    hypot = Math.Sqrt(s1*s1 + s2*s2); 
  
    Console.WriteLine("Hypotenuse is " + hypot); 
  }     
}

Math.Tan()

  
using System; 
 
public class Trigonometry {    
  public static void Main() {    
    Double theta;
     
    for(theta = 0.1; theta <= 1.0; theta = theta + 0.1) { 
      Console.WriteLine("Sine of " + theta + "  is " + 
                        Math.Sin(theta)); 
      Console.WriteLine("Cosine of " + theta + "  is " + 
                        Math.Cos(theta)); 
      Console.WriteLine("Tangent of " + theta + "  is " + 
                        Math.Tan(theta)); 
      Console.WriteLine(); 
    } 
 
  }    
}