Csharp/C Sharp by API/System/Math

Math.Abs

<source lang="csharp"> 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 );
   }

}

 </source>

Math.Cos()

<source lang="csharp"> 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(); 
   } 

 }    

}

 </source>

Math.Min

<source lang="csharp"> using System; public class MainClass {

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

}

 </source>

Math.PI

<source lang="csharp"> 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);
   }  

}

 </source>

Math.Round

<source lang="csharp"> 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));
   }

}

 </source>

Math.Sign

<source lang="csharp"> 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));
   }

}

 </source>

Math.Sin()

<source lang="csharp"> 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(); 
   } 

 }    

}

 </source>

Math.Sqrt

<source lang="csharp">

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); 
 }     

}

 </source>

Math.Tan()

<source lang="csharp"> 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(); 
   } 

 }    

}

 </source>