Function Parameter in C#

Parameter is the essential part of function. However, it is optional but it makes C# function more dynamic than simple function. There are two type of function parameter in C#, Value type parameter and reference type parameter, that is discussed in lateral chapter in this section.


C# parameter is nothing, just a way to passing value to the function and then function calculate the value and then returns appropriate results. You can understand C# function parameter clearly in the following example.

Example:

---

using System;

namespace Understanding_Parameter
{
  class Program
   {
     // function with parameter
     public static int power(int num1)
      {
        int result;
        result = num1 * num1;
        return result;
      }

     static void Main(string[] args)
      {
        int pow;
        // passing arguement as parameter
        pow = Program.power(5);
        Console.Write("\nPower = {0}", pow);
        Console.ReadLine();
      }
   }
}

---

Output

---

Power = 25

---

While using parameterized function, must declare valid return data type with function as follow:
For Integer value:

 public int power(int num1)

For String value:

 public string print(string name)

You also return appropriate value with return keyword.