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Some mathematical functions in C#
In C# ("C sharp"), to be able to use mathematical functions, you need to import the Math class that comes with the C# System namespace. So you must not forget to add the following line:
using System;

Then, all mathematical functions from the Math class become accessible.

    Example :
      using System;

      double x = Math.Cos(Math.PI);
      Console.WriteLine(x);

      This succession of instructions returns the value of \(cos(\pi)\), namely -1.

Here is a non-exhaustive list of the functions available in the C# Math class:

  • To calculate the logarithm of a number (natural logarithm to base \(e\)): \(\ln(x)\)
  • Math.Log(x)

  • To calculate the exponential of a number: \(e^x\) (ou \(\exp(x)\))
  • Math.Exp(x)

  • To calculate the square root of a number: \(\sqrt{x}\)
  • Math.Sqrt(x)

  • To calculate the cosine of a number: \(\cos(x)\)
  • Math.Cos(x)

  • To calculate the sine of a number: \(\sin(x)\)
  • Math.Sin(x)

  • To calculate the tangent of a number: \(tan(x)\)
  • Math.Tan(x)

  • To use the number pi: \(\pi\)
  • Math.PI

  • To calculate the power of a number: \(x^y\)
  • Math.Pow(x,y)

  • To get the closest integer smaller than a number (the integral part): the greatest integer less than or equal to x
  • Math.Floor(x)

  • To get the closest integer greater than a number: the smallest integer greater than or equal to x
  • Math.Ceiling(x)

  • To calculate the absolute value of a number: \(\lvert x \rvert\)
  • Math.Abs(x)

If you have any comments or questions about the Math class of C#, you can discuss them in the forum: Discussion forums.

Quick comments
• Scr@b [07/08/2021 at 19:48:39]
Thank you for this list!
It helped me when I needed it. 🙂

• Message from Admin:
Glad this is helpful. 😉
If you have any questions about it, please go straight to the forum!

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