Action vs. Function in C# – What's the Difference?

In C#, both Action and Function (Func<>) are delegates, but they serve different purposes.

🔹 Action ➡ Represents a method that does not return a value (void).

Action printMessage = message => Console.WriteLine(message);
printMessage("Hello, LinkedIn!");

Here, printMessage takes a string as input and prints it but doesn’t return anything.

🔹 Func ➡ Represents a method that returns a value.

Func add = (a, b) => a + b;
int sum = add(5, 10);
Console.WriteLine(sum); // Output: 15

Here, add takes two integers and returns their sum.

Key Takeaway: Use Action when you don’t need a return value and Func when you do!

Comments

[Ted Rader]

Short and to the point. I like. Fairly new to C#. Question: what's the advantage of using

Func add = (a, b) => a + b;

vs

int add(int a, int b) => a + b;