CSHARP

c# out parameter

/*
C# provides out keyword to pass arguments as out-type. 
It is like reference-type, except that it does not require variable
to initialize before passing. We must use out keyword to pass argument 
as out-type. It is useful when we want a function to return multiple values.
*/

using System;  
namespace OutParameter  
{  
    class Program  
    {  
        // User defined function  
        public void Show(out int val) // Out parameter  
        {  
            int square = 5;  
            val = square;  
            val *= val; // Manipulating value  
        }  
        // Main function, execution entry point of the program  
        static void Main(string[] args)  
        {  
            int val = 50;  
            Program program = new Program(); // Creating Object  
            Console.WriteLine("Value before passing out variable " + val);  
            program.Show(out val); // Passing out argument  
            Console.WriteLine("Value after recieving the out variable " + val);  
        }  
    }  
}  
/*
output:
Value before passing out variable 50
Value after receiving the out variable 25
*/

c# out argument

// Defining Variable inline
myMethod(out Task output);
output.Start();


// Set existing variable
Task output;
myMethod(out output);
output.Start();