What is an anonymous function in c#?| Anonymous function in c#

 What is an anonymous function in c#?

In C#, an anonymous function is a function that does not have a name and is defined inline within a code block. It is also called a lambda expression.

Here is an example of an anonymous function:

Func<int, int> square = x => x * x;

In this example, the anonymous function takes an integer `x` and returns the square of `x`. The `Func<int, int>` part is a delegate type that specifies the type of the input parameter and the return type of the function. The `=>` symbol is used to define the body of the function, which is simply `x * x`.

Anonymous functions are often used for event handling and LINQ queries, where a short, one-time function needs to be defined without creating a separate named method. They can also be used to create closures, which are functions that can access variables from the outer scope.

Anonymous functions in C# can be declared with the following syntax:

(parameters) => expression

where `parameters` is a comma-separated list of input parameters, and `expression` is the body of the function, which can be a single expression or a block of statements enclosed in braces. The compiler infers the type of the parameters and the return type of the function based on the context in which the anonymous function is used.

Anonymous functions can be assigned to a delegate type or passed as a parameter to a method that expects a delegate. They can also be used as a method group in LINQ queries or as an argument to higher-order functions that take functions as input.