How to use parameter/param arrays in C#?

CsharpProgrammingServer Side Programming

While declaring a method, you are not sure of the number of arguments passed as a parameter. C# param arrays can let you know about this.

This is how you can use the param −

public int AddElements(params int[] arr) {

The following is the complete example to learn how to implement param in C# −


 Live Demo

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);


The sum is: 1620
Updated on 20-Jun-2020 11:47:18