C Sharp Function

C# Function

A block of code with a signature that is used to execute the specified statements is called a function in C#.

Components of a Function:

Function name: It is used to specify a unique name to be used for calling a Function.
Return type: It is used to define the data type of the return value of the function.
Body: It is used to define a block for executable statements.
Access specifier: It is used to define the accessibility of the function in an application.
Parameters: It is used to specify a list of parameters to be passed during the function call.

Syntax:

<access-specifier><return-type>FunctionName(<parameters>)  
{  
// function body  
// return statement  
}

Explanation:

It is optional to specify the Access-specifier, parameters and return statement.

C# Function: using no parameter and return type.

Example:

using System;  
namespace Func_xample  
{  
    class Example  
    {  
 
        public void Display() 
        {  
            Console.WriteLine("Hello World!!");  
 
        }  
 
        static void Main(string[] args)  
        {  
            Example xyz = new Example();  
            xyz.Display();            
        }  
    }  
}

Output:

Explanation:

In the above example, we are creating a function without any parameters, also known as the non-parameterized function and also without any return type. The return type is thus void.

C# Function: using parameter but no return type.

Example:

using System;  
namespace FuncExample  
{  
    class Example  
    {  
        public void Display(string msg)  
        {  
            Console.WriteLine("Hello " + msg);  
        }  
        static void Main(string[] args)  
        {  
            Example xyz = new Example(); 
            xyz.Display("World!!");             
        }  
    }  
}

Output:

Explanation:

In the above example, we are creating a function with the parameters but no return types.

C# Function: using parameter and return type.

Example:

using System;  
namespace FuncExample  
{  
    class Example  
    {  
        public string Display(string msg)  
        {  
         Console.WriteLine("Message for you!!");  
         return msg;  
        }  
        static void Main(string[] args)  
        {  
            Example xyz = new Example();  
            string msg = xyz.Display("World!!");  
            Console.WriteLine("Hello "+ msg);  
        }  
    }  
}

Output:

Explanation:

In the above example, we are creating a function with both the parameters and return types.