C# Program to Demonstrate Pass by Reference

This is a C# Program to demonstrate pass by reference parameter.

This C# Program Demonstrates Pass by Reference Parameter.

Here Passing by reference enables function members, methods to change the value of the parameters and have that change persist in the calling environment. To pass a parameter by reference, use the ref or out keyword.

Here is source code of the C# Program to Demonstrate Pass by Reference Parameter . The C# program is successfully compiled and executed with Microsoft Visual Studio. The program output is also shown below.

/*
 * C# Program to Demonstrate Pass by Reference Parameter 
 */
using System;
class Program
{
    static void Main(string[] args)
    {
        int val;
        val = 4;
        Console.WriteLine("Value Before : {0}", val);
        square(ref val);
        Console.WriteLine("Value After : {0}", val);
        Console.Read();
    }
    static void square(ref int refParam)
    {
        refParam *= refParam;
    }
}

This C# program is used to demonstrate pass by reference parameter. We have already defined the value for ‘val’ variable as 4. Then we are calling the square() function by passing ‘val’ variable value as an argument.

Here passing by reference enables function members, methods to change the value of the parameters and have that change persist in the calling environment. To pass a parameter by reference, use the ref or out keyword.

 
Value Before : 4
Value After : 16