Complex.Subtract Method

The subtraction of a complex number, c + di, from another complex number, a + bi, takes the following form:

(a - c) + (b - d)i

If the method call results in an overflow in either the real or imaginary component, the value of that component is either Double.PositiveInfinity or Double.NegativeInfinity.

Languages that do not support custom operators can use the Subtract method to perform subtraction using complex numbers.

The following example subtracts each complex number in an array from a complex number.

using System;
using System.Numerics;

public class Example
{
   public static void Main()
   {
      Complex c1 = new Complex(4.93, 6.87);
      Complex[] values = { new Complex(12.5, 9.6), 
                           new Complex(4.3, -8.1), 
                           new Complex(-1.9, 7.4), 
                           new Complex(-5.3, -6.6) };

      foreach (var c2 in values)
         Console.WriteLine("{0} - {1} = {2}", c1, c2, 
                           Complex.Subtract(c1, c2));
   }
}
// The example displays the following output: 
//       (4.93, 6.87) - (12.5, 9.6) = (-7.57, -2.73) 
//       (4.93, 6.87) - (4.3, -8.1) = (0.63, 14.97) 
//       (4.93, 6.87) - (-1.9, 7.4) = (6.83, -0.53) 
//       (4.93, 6.87) - (-5.3, -6.6) = (10.23, 13.47)

.NET Framework

.NET Framework Client Profile

Portable Class Library

.NET for Windows Store apps

Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

Reference