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Truncate Method (Double)
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Math.Truncate Method (Double)

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

Namespace:  System
Assemblies:   mscorlib (in mscorlib.dll)
  System.Runtime.Extensions (in System.Runtime.Extensions.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.

Truncate rounds d to the nearest integer towards zero.

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));

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

.NET for Windows Phone apps

Supported in: Windows Phone 8.1, Windows Phone Silverlight 8.1, Windows Phone Silverlight 8

Portable Class Library

Supported in: Portable Class Library
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