Explain Param Array with example

Posted by Rajnilari2015 on 9/28/2015 | Category: C# Interview questions | Views: 1726 | Points: 40

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Answer:

If we want to pass variable number of arguments from calling function to called function, we can use the Params Arrays

e.g.

public class ParamTest

{

	static void Main()

	{

		//calling function

		PerformArithmeticOperation(20,10,"+"); //perform addition

		PerformArithmeticOperation(20,10,"-"); //perform subtraction

		PerformArithmeticOperation(20,10,"*"); //perform multiplication

		PerformArithmeticOperation(20,10,"/"); //perform division

	}



	//called function

	public static void PerformArithmeticOperation(params object[] items)

	{        

			var result = 0;

			switch (Convert.ToString(items[2]))   //items[2] is the operator(s) i.e. +,-,*,/

			{

				case '+': result = Convert.ToInt32(items[0]) + Convert.ToInt32(items[1]); break;

				case '-': result = Convert.ToInt32(items[0]) - Convert.ToInt32(items[1]); break;

				case '*': result = Convert.ToInt32(items[0]) * Convert.ToInt32(items[1]); break;

				case '/': result = Convert.ToInt32(items[0]) / Convert.ToInt32(items[1]); break;

				default: Console.WriteLine("No such operation available");

			}

			Console.WriteLine(result);		

	}

}