Article
11/18/2011

Math.Abs Method (Double)

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Updated: September 2010

Returns the absolute value of a double-precision floating-point number.

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

Syntax

'Declaration
<SecuritySafeCriticalAttribute> _
Public Shared Function Abs ( _
    value As Double _
) As Double

[SecuritySafeCriticalAttribute]
public static double Abs(
    double value
)

Parameters

value
Type: System.Double
A number that is greater than or equal to Double.MinValue, but less than or equal to Double.MaxValue.

Return Value

Type: System.Double
A double-precision floating-point number, x, such that 0 ≤ x ≤Double.MaxValue.

Remarks

The absolute value of a Double is its numeric value without its sign. For example, the absolute value of both 1.2e-03 and -1.2e03 is 1.2e03.

If value is equal to NegativeInfinity or PositiveInfinity, the return value is PositiveInfinity. If value is equal to NaN, the return value is NaN.

Examples

The following example uses the Math.Abs(Double) method to get the absolute value of several Double values.

Dim doubles() As Double = {Double.MaxValue, 0.00000000000000016354, 15.098123, 0, _
                            -19.069713, -1.5058E+19, Double.MinValue}
For Each value As Double In doubles
   outputBlock.Text += String.Format("Abs({0}) = {1}", value, Math.Abs(value)) & vbCrLf
Next
' The example displays the following output:
'       Abs(1.79769313486232E+308) = 1.79769313486232E+308
'       Abs(1.6354E-16) = 1.6354E-16
'       Abs(15.098123) = 15.098123
'       Abs(0) = 0
'       Abs(-19.069713) = 19.069713
'       Abs(-1.5058E+19) = 1.5058E+19
'       Abs(-1.79769313486232E+308) = 1.79769313486232E+308

double[] doubles = { Double.MaxValue, 16.354e-17, 15.098123, 0, 
                     -19.069713, -15.058e18, Double.MinValue };
foreach (double value in doubles)
   outputBlock.Text += String.Format("Abs({0}) = {1}", value, Math.Abs(value)) + "\n";

// The example displays the following output:
//       Abs(1.79769313486232E+308) = 1.79769313486232E+308
//       Abs(1.6354E-16) = 1.6354E-16
//       Abs(15.098123) = 15.098123
//       Abs(0) = 0
//       Abs(-19.069713) = 19.069713
//       Abs(-1.5058E+19) = 1.5058E+19
//       Abs(-1.79769313486232E+308) = 1.79769313486232E+308

Version Information

Silverlight

Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

XNA Framework

Supported in: Xbox 360, Windows Phone OS 7.0

Platforms

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

Change History

Date	History	Reason
September 2010	Added a definition of absolute value.	Customer feedback.

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