C# - Param Arrays

At times, while declaring a method, you are not sure of the number of arguments passed as a parameter. C# param arrays (or parameter arrays) come into help at such times.

The following example demonstrates this:

using System;
namespace ArrayApplication
{
class ParamArray
{
public int AddElements(params int[] arr)
{
int sum = 0;
foreach (int i in arr)
{
sum += i;
}
return sum;
}
}

class TestClass
{
static void Main(string[] args)
{
ParamArray app = new ParamArray();
int sum = app.AddElements(512, 720, 250, 567, 889);
Console.WriteLine("The sum is: {0}", sum);
Console.ReadKey();
}
}
}

When the above code is compiled and executed, it produces the following result:

The sum is: 2938