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# Math.Truncate Method (Double)

Visual Studio 2008

Calculates the integral part of a specified double-precision floating-point number.

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

## Syntax

```public static double Truncate(
double d
)
```

#### Parameters

d
Type: System.Double

A number to truncate.

#### Return Value

Type: System.Double
The integral part of d; that is, the number that remains after any fractional digits have been discarded, or one of the values listed in the following table.

## Remarks

Truncate rounds d to the nearest integer towards zero.

## Examples

The following example calls the Truncate(Double) method to truncate both a positive and a negative Double value.

```double floatNumber;

floatNumber = 32.7865;
// Displays 32
Console.WriteLine(Math.Truncate(floatNumber));

floatNumber = -32.9012;
// Displays -32
Console.WriteLine(Math.Truncate(floatNumber));
```

## Platforms

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

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.

## Version Information

#### .NET Framework

Supported in: 3.5, 3.0, 2.0