const value

We can use const modifier to indicate that a field is a constant.

The following Math class has a constant field PI.


class Math
{
    public const double PI = 3.14;
}

const field can be used in a method.


using System;

class Program
{
    static void Main(string[] args)
    {
        const double PI = 3.14;
        Console.WriteLine(2 * PI);
    }
}

The output:


6.28

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