Optional Parameter in C# Language

Default parameter include in c# 4.0 version. You can, however, provide a code generator that creates a set of overloads from a declaration containing default arguments. Optional parameters are defined at the end of the parameter list, after any required parameters in a function. When you call to a function and you are not pass other value to default. Then default parameter value use in a function.

Example

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

namespace optional_parameter_in_c_sharp

{

class parameter //create class

{

//create a function with two parameter, x and y, where y assign default value 5.5

public double sum(double x, double y = 5.5)

{