Params Keyword in C#

Now, to call these methods, we can create an array of objects and pass it as a params parameter. Alternatively, we can also pass a comma separated values for params. The following code snippet shows both of these examples.

// Total for 3rd grade. Pass 3 comma separate values as params  
Console.WriteLine("Params with 3 parameters");  
int total3 = Students.TotalMarks(8, 9, 8);  
// Print result  
Console.WriteLine(total3);  
// Create an array of strings   
string[] subs = {"English", "Reading", "Writing"};  
// Pass array of strings as a params and print result  
Console.WriteLine(Students.AllSubjects(subs));

C# Params Code Example

Here is a complete code example written in C# that shows how to pass different numbers of variables in a method as a params argument and read these values back in the caller code.

using System;  
  
namespace ParamsSample  
{  
  
    public class Students  
    {  
        public static int TotalMarks(params int[] list)  
        {  
            int total = 0;  
            for (int i = 0; i < list.Length; i++)  
                total += list[i];  
            return total;  
        }  
  
        public static string AllSubjects(params string[] subjects)  
        {  
            System.Text.StringBuilder builder = new System.Text.StringBuilder();  
            for (int i = 0; i < subjects.Length; i++)  
            {  
                builder.Append(subjects[i]);  
                builder.Append(" ");  
            }  
            return builder.ToString();  
        }  
    }  
  
    class Program  
    {  
  
        static void Main(string[] args)  
        {  
            // Total for 3rd grade. Pass 3 comma separate values as params  
            Console.WriteLine("Params with 3 parameters");  
            int total3 = Students.TotalMarks(8, 9, 8);  
            // Print result  
            Console.WriteLine(total3);  
            // Create an array of strings   
            string[] subs = {"English", "Reading", "Writing"};  
            // Pass array of strings as a params and print result  
            Console.WriteLine(Students.AllSubjects(subs));  
  
            // Total for 8th grade          
            Console.WriteLine("Params with 4 parameters");  
            int[] marks = { 24, 22, 25, 21 };  
            int total4 = Students.TotalMarks(marks);  
            string str4 = Students.AllSubjects("Math", "English", "Art", "Social Science");  
            Console.WriteLine(total4);  
            Console.WriteLine(str4.ToString());  
  
            // Total for 10th grade  
            Console.WriteLine("Params with 5 parameters");  
            int total5 = Students.TotalMarks(92, 90, 95, 91, 98);  
            string str5 = Students.AllSubjects(new string[]{ "Math", "English", "Art", "Social Science", "Gym"});  
            Console.WriteLine(total5);  
            Console.WriteLine(str5.ToString());  
  
            Console.ReadKey();  
        }  
          
    }  
}

C# Params Output

The output of the above code looks like the following: