C-Sharp Atan Example – Code Sample Syntax

C-Sharp Atan Example – Code Sample Syntax

Purpose: – Illustrates using .

Purpose:
converts a tangent to radians of an angle. The function
takes a double data type number and returns a double value
that repesents the radians of the angle for that tangent.
(you can convert the radians to degrees by multiplying
them by Math.PI/180)

Syntax:
Atan(double)

Parameters Description
double The expression represents a tangent that
is to be converted into radians of an angle.
Any valid System.Double data type number between -1 and +1
if number < -1 or > 1, NaN is returned – NaN stands for Not a Number

Result Data Type Description
double represents the radians of the angle of the
tangent that was specified as the input parameter.

Quick Example
Atan(90) // Returns 1.55968567289729

Step 1: Click cs to Cut-n-paste code into clsAtan.cs

using System;
public class clsAtan
{
 
    public void Main()
    {
 
 
        //********************************************************************************
        // Purpose: converts a tangent to radians of an angle. The function 
        // takes a double data type number and returns a double value 
        // that repesents the radians of the angle for that tangent. 
        // (you can convert the radians to degrees by multiplying 
        // them by Math.PI/180)
        // 
        // Syntax: 	Atan(double)
        //  
        // Parameter1: double - The expression represents a tangent that 
        // is to be converted into radians of an angle. 
        // Any valid System.Double data type number between -1 and +1 
        // if number < -1 or > 1, NaN is returned - NaN stands for Not a Number
        //
        // Result: double - represents the radians of the angle of the 
        // tangent that was specified as the input parameter.
        //
        // Quick Example: Atan(90) // Returns 1.55968567289729
        //
        //********************************************************************************
        // This example is from http://idealprogrammer.com
 
        Console.WriteLine("Example #1: 	Atan(double)");
 
        Console.WriteLine(Math.Atan(90)); // Returns 1.55968567289729
 
        //write blank line to make output easier to read
        Console.WriteLine();
 
        Console.WriteLine("Example #2: 	Atan(double)");
 
        Console.WriteLine(Math.Atan(-3.4)); // Returns -1.28474488507758
        //write blank line to make output easier to read
        Console.WriteLine();
 
        Console.WriteLine("Example #3: 	Atan(double)");
 
        Console.WriteLine(Math.Atan(-0)); // Returns 0
 
        //Prevent console from closing before you press enter
        Console.ReadLine();
 
    }
 
}

Step 2: Click cs to Cut-n-paste code into Module1.cs

Module Module1
 
    Sub Main()
 
 
        Dim myclsAtan As New clsAtan
        myclsAtan.Main()
 
 
 
    End Sub
 
End Module

Prerequistes:

  1. Install C-Sharp (Express or Standard Edition)
  2. Install SQL Server Express
  3. Download Northwind and pubs Database
  4. Attach Northwind Database to Databases in Sql Express
  5. Attach pubs Database to Databases in Sql Express

Notes:

  • Console Application is used to simplify things, but Windows Forms or Web Forms could also be used
  • You can build a library of syntax examples by using same project over and over and just commenting out what you do not want to execute in Module1.cs

Instructions:
C-Sharp Syntax Functions Atan

  1. Use C-Sharp 2010 Express or Standard Edition
  2. Create new project;
    • Click File/New Project
    • Select Console Application Template
    • Select C-Sharp for Language
    • name of project could be C-Sharp_Syntax.
  3. Add New folder named “Functions”
    • Right-click project name in solution explorer;
    • add new folder;
    • name of folder could be: Functions
  4. Add New subfolder named “MathFunctions”
    • Right-click Functions folder in solution explorer;
    • add new folder;
    • name of folder could be: MathFunctions
  5. Add Class Named clsAtan to MathFunctions folder
    • Right-click MathFunctions folder;
    • add new item;
    • Select class
    • Class name could be clsAtan
  6. Click on cs in code in step 1 above to copy code into clsAtan.cs
  7. Click on cs in code in step 2 above to copy code into Module1.cs
  8. Click green arrow or press F5 to run program