1.

How can we use Param Arrays in C#?

Answer»

If you are not sure of the parameters in the arrays, then you can use the param type arrays. The param arrays hold n number of parameters.

The following is an example:

using System; namespace Application {   class Example {      public int Display(PARAMS int[] a) {         int mul = 1;         foreach (int i in a) {            mul *= i;         }         RETURN mul;      }   }   class DEMO {      static void MAIN(string[] args) {         Example ex = new Example();         int mul = ex.Display(3, 4, 5);         Console.WriteLine("Result = {0}", mul);         Console.ReadKey();      }   } }

The OUTPUT:

Result = 60

Here is another example of param arrays in C#:

using System; namespace ArrayDemo {   class Example   {       static int SumOfElements(params int[] p_arr)        {            int sum=0;            foreach (int i in p_arr)            {               sum += i;            }            return sum;        }      static void Main(string[] args)      {            int sum=0;            sum = SumOfElements(4, 8, 7, 3, 1);            Console.WriteLine("Sum of 5 Parameters: {0}", sum);            sum = SumOfElements(5, 7);            Console.WriteLine("Sum of 2 Parameters: {0}", sum);            sum = SumOfElements(10, 7, 9);            Console.WriteLine("Sum of 3 Parameters: {0}", sum);      }   } }

The output of the above program is as follows:

Sum of 5 Parameters: 23 Sum of 2 Parameters: 12 Sum of 3 Parameters: 26


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