About
In this code snippet, we’ll take a look at local functions in C#.
Local functions can be declared and used only within another function. This can be useful for organizing your code. For example, if a function gets too long, you would usually break it up into smaller ones, which will fragment your code. This is the perfect case for using local functions to logically group/contain these smaller functions within the parent function.
Let’s see how to use local functions in the code example below.
Code:
using System;
namespace LocalFunctions
{
internal class Program
{
static void Main(string[] args)
{
printNumbers();
}
static void printNumbers()
{
//Calling local_getNumbers() defined and only available within printNumbers().
string numbers = local_getNumbers();
Console.WriteLine(numbers);
//Local function
string local_getNumbers()
{
string numbers = string.Empty;
for (int i = 0; i < 10; i++)
{
numbers += i + ", ";
}
return numbers;
}
}
}
}
Resulting output:
