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Math.Truncate Method (Double)

.NET Framework 4.5

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

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

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.

d	Return value
NaN	NaN
NegativeInfinity	NegativeInfinity
PositiveInfinity	PositiveInfinity

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));

Version Information

.NET Framework

Supported in: 4.5, 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Portable Class Library

Supported in: Portable Class Library

.NET for Windows Store apps

Supported in: Windows 8

Platforms

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

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