# Complex.Subtraction Operator

Subtracts a complex number from another complex number.

Namespace:  System.Numerics
Assembly:  System.Numerics (in System.Numerics.dll)

## Syntax

``````'Declaration
Public Shared Operator - ( _
left As Complex, _
right As Complex _
) As Complex
``````
``````public static Complex operator -(
Complex left,
Complex right
)
``````

#### Return Value

Type: System.Numerics.Complex
The result of subtracting right from left.

## Remarks

The Subtraction method defines the operation of the subtraction operator for complex numbers. It enables code such as the following:

``````Dim c1 As New System.Numerics.Complex(6.7, -1.3)
Dim c2 As New System.Numerics.Complex(1.4, 3.8)
Dim result As System.Numerics.Complex = c1 - c2
outputBlock.Text += String.Format("{0} - {1} = {2}", c1, c2, result) & vbCrLf
' The example displays the following output:
'       (6.7, -1.3) - (1.4, 3.8) = (5.3, -5.1)
``````
``````System.Numerics.Complex c1 = new System.Numerics.Complex(6.7, -1.3);
System.Numerics.Complex c2 = new System.Numerics.Complex(1.4, 3.8);
System.Numerics.Complex result = c1 - c2;
outputBlock.Text += String.Format("{0} - {1} = {2}", c1, c2, result) + "\n";
// The example displays the following output:
//       (6.7, -1.3); - (1.4, 3.8); = (5.3, -5.1)
``````

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.

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

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

Languages that do not support custom operators can call the Subtract method instead.

## Version Information

#### Silverlight

Supported in: 5, 4

## Platforms

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.