In the past, every language has had its own set of keywords for common math operations such as rounding and trigonometry. In .NET languages, many of these keywords remain. However, you can also use a centralized Math class that’s part of the .NET Framework. This has the pleasant side effect of ensuring that the code you use to perform mathematical operations can easily be translated into equivalent statements in any .NET language with minimal fuss. To use the math operations, you invoke the methods of the System.Math class. These methods are static, which means they are always available and ready to use.

The following code snippet shows some sample calculations that you can perform with the Math class:

double myValue;

myValue = Math.Sqrt(81); // myValue = 9.0

myValue = Math.Round(42.889, 2); // myValue = 42.89

myValue = Math.Abs(-10); // myValue = 10.0

myValue = Math.Log(24.212); // myValue = 3.18.. (and so on)

myValue = Math.PI; // myValue = 3.14.. (and so on)

The features of the Math class are too numerous to list here in their entirety. The preceding examples show some common numeric operations. For more information about the trigonometric and logarithmic functions that are available, refer to the Visual Studio Help reference for the Math class.

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