Example of Action and Func Delegates in C#

The following program demonstrates an Example of Action and Func Delegates in C#.

Basically, Action is a delegate that represents a function that doesn’t return a value. In contrast, the Func delegate represents a method that returns a value. Both of these delegates take one or more arguments.

The following program shows the use of Action delegate in computing the multiplication of two numbers. While the second Action delegate computes an expression. Similarly, the first Func delegate returns the sum of two numbers. Whereas the second Func delegate returns the value of an expression.

using System;
namespace ActionAndFuncDemo
{
    class Program
    {
        static void Main(string[] args)
        {
            Action<int, int> ob1 = (x, y) => Console.WriteLine(x * y);
            ob1(12, 15);
            Action<int, int> ob11 = (a, b) => Console.WriteLine(Math.Sqrt(a * a + b * b));
            ob11(3, 4);

            Func<int, int, int> ob2 = (x, y) => x + y;
            int z = ob2(12, 15);
            Console.WriteLine("Sum = {0}", z);
            Func<int, int, double> ob21 = (a, b) => Math.Sqrt(a * a + b * b);
            Console.WriteLine($"Result = {ob21(3, 4)}");
        }
    }
}

Output

**Demonstrating an Example of Action and Func Delegates in C#**

Further Reading