- What is Output parameter in C sharp?
- What is the advantage of Out parameter?
- How to use Out parameter in C# programming?
C# out parameter is such type of parameter that is declared with out keyword. It is the same as reference parameter, that doesn’t create memory allocation.
Why use out parameter in C#?
Usually, a method returns value with return keyword. Unfortunately, a return modifier can return only one value at a time. Sometime, your C# program required to return multiple values from a single method. In this situation, you need such type of function that can produce multiple output result from a single function. The output parameter C# lets your program to return multiple values.
Programming examples of out parameter C#
- using System;
- using System.Collections.Generic;
- using System.Linq;
- using System.Text;
- namespace out_parameter
- {
- class Program
- {
- //Accept two input parameter and returns two out value
- public static void rect(int len, int width, out int area, out int perimeter)
- {
- area = len * width;
- perimeter = 2 * (len + width);
- }
- static void Main(string[] args)
- {
- int area, perimeter;
- // passing two parameter and getting two returning value
- Program.rect(5, 4, out area, out perimeter);
- Console.WriteLine("Area of Rectangle is {0}\t", area);
- Console.WriteLine("Perimeter of Rectangle is {0}\t", perimeter);
- Console.ReadLine();
- }
- }
- }
Output
Area of Rectangle is 20
Perimeter of Rectangle is 18 __
In the preceding example, we created a method that accepts two input parameter and returns two out value.
Summary
In this chapter you learned about what is out parameter and how to use out parameter in C# programming. In next chapter you will learn about Command Line Argument in C#.