Math.Round Method (Decimal)
[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]
Rounds a decimal value to the nearest integral value.
Namespace: System
Assembly: mscorlib (in mscorlib.dll)
Syntax
Public Shared Function Round ( _
d As Decimal _
) As Decimal
public static decimal Round(
decimal d
)
Parameters
- d
Type: System..::.Decimal
A decimal number to be rounded.
Return Value
Type: System..::.Decimal
The integer nearest parameter d. If the fractional component of d is halfway between two integers, one of which is even and the other odd, then the even number is returned. Note that the method returns a Decimal type rather than an integral type.
Exceptions
| Exception | Condition |
|---|---|
| OverflowException | The result is outside the range of a Decimal. |
Remarks
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. It minimizes rounding errors that result from consistently rounding a midpoint value in a single direction.
Examples
The following example demonstrates rounding to nearest.
Module Example
Public Sub Demo(ByVal outputBlock As System.Windows.Controls.TextBlock)
outputBlock.Text &= "Classic Math.Round in Visual Basic" & vbCrLf
outputBlock.Text &= Math.Round(4.4) & vbCrLf ' 4
outputBlock.Text &= Math.Round(4.5) & vbCrLf ' 4
outputBlock.Text &= Math.Round(4.6) & vbCrLf ' 5
outputBlock.Text &= Math.Round(5.5) & vbCrLf ' 6
End Sub
End Module
using System;
class Example
{
public static void Demo(System.Windows.Controls.TextBlock outputBlock)
{
outputBlock.Text += "Classic Math.Round in CSharp" + "\n";
outputBlock.Text += Math.Round(4.4) + "\n"; // 4
outputBlock.Text += Math.Round(4.5) + "\n"; // 4
outputBlock.Text += Math.Round(4.6) + "\n"; // 5
outputBlock.Text += Math.Round(5.5) + "\n"; // 6
}
}
Version Information
Windows Phone OS
Supported in: 8.1, 8.0, 7.1, 7.0
Platforms
Windows Phone