This documentation is archived and is not being maintained.

Math.Abs Method (Single)

Updated: August 2010

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

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

public static float Abs(
	float value


Type: System.Single

A number that is greater than or equal to Single.MinValue, but less than or equal to Single.MaxValue.

Return Value

Type: System.Single
A single-precision floating-point number, x, such that 0 x Single.MaxValue.

The absolute value of a Single 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.

The following example uses the Abs(Single) method to obtain the absolute value of several Single values.

float[] values= { Single.MaxValue, 16.354e-12F, 15.098123F, 0F, 
                  -19.069713F, -15.058e17F, Single.MinValue };
foreach (float value in values)
   Console.WriteLine("Abs({0}) = {1}", value, Math.Abs(value));

// The example displays the following output: 
//       Abs(3.402823E+38) = 3.402823E+38 
//       Abs(1.6354E-11) = 1.6354E-11 
//       Abs(15.09812) = 15.09812 
//       Abs(0) = 0 
//       Abs(-19.06971) = 19.06971 
//       Abs(-1.5058E+18) = 1.5058E+18 
//       Abs(-3.402823E+38) = 3.402823E+38

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC, Xbox 360, Zune

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

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 3.5, 2.0, 1.0

XNA Framework

Supported in: 3.0, 2.0, 1.0




August 2010

Added a definition of absolute value.

Customer feedback.

October 2008

Replaced the example.

Customer feedback.