CHASH Tutorial

Math in C#

The Math class in C# provides many useful static methods for performing mathematical operations such as rounding, powers, roots, trigonometry, and constants.

1. Common Math Methods

• Math.Abs(x) — Returns the absolute value of x.
• Math.Pow(x, y) — Returns x raised to the power y.
• Math.Sqrt(x) — Returns the square root of x.
• Math.Round(x) — Rounds x to the nearest integer.
• Math.Ceiling(x) — Rounds x up to the nearest integer.
• Math.Floor(x) — Rounds x down to the nearest integer.

2. Example Code

using System;

class Program
{
    static void Main()
    {
        double num = -15.7;

        Console.WriteLine(Math.Abs(num));          // 15.7
        Console.WriteLine(Math.Pow(2, 3));         // 8 (2³)
        Console.WriteLine(Math.Sqrt(49));          // 7
        Console.WriteLine(Math.Round(3.6));        // 4
        Console.WriteLine(Math.Ceiling(3.1));      // 4
        Console.WriteLine(Math.Floor(3.9));        // 3
    }
}

  

3. Trigonometric Methods

C# also supports trig functions in radians:

• Math.Sin(angle) — Sine
• Math.Cos(angle) — Cosine
• Math.Tan(angle) — Tangent

double angle = Math.PI / 4; // 45 degrees in radians
Console.WriteLine(Math.Sin(angle));  // ~0.707
Console.WriteLine(Math.Cos(angle));  // ~0.707
Console.WriteLine(Math.Tan(angle));  // ~1

  

4. Useful Constants

• Math.PI — The constant π (~3.14159)
• Math.E — The constant e (~2.71828)