To make our functions even more flexible, we can make certain parameters optional. If someone calls your method without all the parameters, the method will assign a default value to those missing parameters.

All you have to do is use the equals sign (=) when defining the method. In this example, punctuation is an optional parameter, and its default value is ".".

static void Main(string[] args)
{
  YourMethodName("I'm hungry", "!"); // prints "I'm hungry!"
  YourMethodName("I'm hungry");  // prints "I'm hungry."
}

static void YourMethodName(string message, string punctuation = ".")
{
  Console.WriteLine(message + punctuation);
}