C# Math Functions

Mathematical functions can be performed using the System.Math class. System.Math is a static class that is included within .NET as part of the System namespace. .NET is a free, cross-platform, open source developer platform created by Microsoft.

Syntax

The Math class can be accessed by including the System namespace within a .cs file by adding the following line:

// Include the System namespace
using System;

The Math class is static and is accessed without needing to create an instance.

Example

The following example uses the Math.Pow() method to return the result of 4 raised to the power of 2:

// Include the System namespace
using System;

public class Example
{
  public static void Main(string[] args)
  {
    // Raise 4 to power of 2
    double x = Math.Pow(4,2);

    System.Console.WriteLine("x = {0}", x);
    // Output: x = 16
  }
}

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In cases where access to System.Math is required but access to the entire System namespace is not, an alternative syntax can be used instead. The following example uses an alternative syntax and returns the floor of 3/2 using the System.Math.Floor() method:

public class Example
{
  public static void Main(string[] args)
  {
    // Round down the result of 3/2
    double x = System.Math.Floor((double)3/2);

    System.Console.WriteLine("x = {0}", x);
    // Output: x = 1
  }
}

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Below are a selected list of System.Math methods: