C sharp - mathematical function
<p>In C#, a <strong>mathematical function</strong> typically refers to a method that performs a specific math-related operation. This can range from simple arithmetic (like addition or multiplication) to more complex operations (like trigonometric functions or logarithms).</p>
<h3>1. <strong>Built-in Math Functions (System.Math)</strong></h3>
<p>C# provides a <code>Math</code> class in the <code>System</code> namespace, which includes many static methods for mathematical operations.</p>
<h2>Common Examples:</h2>
<pre><code class="language-csharp">using System;
class Program
{
static void Main()
{
double a = 9;
double b = -5;
Console.WriteLine(Math.Sqrt(a)); // Square root: 3
Console.WriteLine(Math.Abs(b)); // Absolute value: 5
Console.WriteLine(Math.Pow(2, 3)); // 2^3 = 8
Console.WriteLine(Math.Sin(Math.PI / 2)); // sin(90°) = 1
Console.WriteLine(Math.Log(100)); // Natural log of 100
}
}
</code></pre>
<blockquote>
<p>The <code>Math</code> class supports types like <code>double</code> and <code>decimal</code> but not directly <code>float</code>. You can cast if needed.</p>
</blockquote>
<h3>2. <strong>Custom Mathematical Functions</strong></h3>
<p>You can define your own functions using methods:</p>
<pre><code class="language-csharp">class Program
{
// A method that computes the square of a number
static double Square(double x)
{
return x * x;
}
static void Main()
{
double num = 4;
Console.WriteLine(Square(num)); // Output: 16
}
}
</code></pre>
<h3>3. <strong>Math with Delegates or Func</strong></h3>
<p>You can pass math functions as parameters using <code>Func<T></code>:</p>
<pre><code class="language-csharp">using System;
class Program
{
static double ApplyFunction(Func<double, double> func, double value)
{
return func(value);
}
static void Main()
{
double result = ApplyFunction(Math.Sqrt, 25);
Console.WriteLine(result); // Output: 5
}
}
</code></pre>
<h3> </h3>
<ul>
<li>
<p>Use <code>System.Math</code> for built-in functions like <code>Math.Sqrt()</code>, <code>Math.Pow()</code>, etc.</p>
</li>
<li>
<p>Define custom math functions using methods.</p>
</li>
<li> </li>
</ul>
<p> </p>
