CHASH Tutorial

C# Local Functions

Local functions are functions defined inside another method. They help organize code by keeping helper functions close to where they are used, improving readability and encapsulation.

Features

• Defined inside a method (like Main or any other method).
• Can access variables from the enclosing method.
• Not accessible outside the containing method.

Example: Using a Local Function

class Program
{
    static void Main()
    {
        Console.WriteLine("Factorial of 5 is: " + Factorial(5));

        // Local function to calculate factorial
        int Factorial(int n)
        {
            if (n <= 1)
                return 1;
            return n * Factorial(n - 1);
        }
    }
}
  

Why Use Local Functions?

• Encapsulate helper logic inside methods without cluttering class scope.
• Access variables from the outer method easily.
• Improve code readability and maintenance.