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Math.Round Method (Decimal)

Rounds a decimal value to the nearest integer.

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

public static decimal Round (
	decimal d
public static Decimal Round (
	Decimal d
public static function Round (
	d : decimal
) : decimal



A decimal number to be rounded.

Return Value

The integer nearest parameter d. If d is halfway between two integers, one of which is even and the other odd, then the even number is returned.

Exception typeCondition


The result is outside the range of a Decimal.

The behavior of this method follows IEEE Standard 754, section 4. This kind of rounding is sometimes called rounding to nearest, or banker's rounding.

The following example demonstrates rounding to nearest.

Math.Round(4.4); //Returns 4.0.
Math.Round(4.5); //Returns 4.0.
Math.Round(4.6); //Returns 5.0.

System.Math.Round(4.4); //Returns 4.0.
System.Math.Round(4.5); //Returns 4.0.
System.Math.Round(4.6); //Returns 5.0.

System.Math.Round(4.4) //Returns 4.0.
System.Math.Round(4.5) //Returns 4.0.
System.Math.Round(4.6) //Returns 5.0.

Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

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

.NET Framework

Supported in: 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0, 1.0