Parameters

a

A double to be rounded.

Returns

A double containing the value of the integer nearest a. If a is exactly halfway between two integers, one of which is even and the other odd, then the even integer is returned.

Remarks

The behavior of this method follows IEEE Standard 754, section 4.1.

Example

The following example demonstrates using the Math.Round(double)(double) method.

C# Example

using System;

public class MathRoundExample
{

   public static void Main()
   {

      Double d1 = Math.Round(4.4);
      Double d2 = Math.Round(4.5);
      Double d3 = Math.Round(4.6);
      Console.WriteLine("Math.Round(4.4) returns {0}", d1);
      Console.WriteLine("Math.Round(4.5) returns {0}", d2);
      Console.WriteLine("Math.Round(4.6) returns {0}", d3);

   }

}

The output is

Math.Round(4.4) returns 4
Math.Round(4.5) returns 4
Math.Round(4.6) returns 5

Requirements

Namespace: System
Assembly: mscorlib (in mscorlib.dll)
Assembly Versions: 1.0.5000.0, 2.0.0.0