When declaring a method, you are not sure of the number of arguments passed as formal parameters. This is where the C# parameter array (or parameter array) comes in handy.
This is how to use parameters -
public int AddElements(params int[] arr) { }
Here is the complete example -
Example
using System; namespace Program { class ParamArray { public int AddElements(params int[] arr) { int sum = 0; foreach (int i in arr) { sum += i; } return sum; } } class Demo { static void Main(string[] args) { ParamArray app = new ParamArray(); int sum = app.AddElements(300, 250, 350, 600, 120); Console.WriteLine("The sum is: {0}", sum); Console.ReadKey(); } } }
Output
The sum is: 1620
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