You learned a lot this lesson: congrats on finishing! Here’s what you’ve covered:

• Call a method with its name and parentheses:

  VisitPlanets();

• Store a method’s returned value in a variable:

  double result = Math.Round(3.14159, 2);

• Define a basic method with the following syntax:

  static void VisitPlanets()
  {
  }

• Every time an application is started, the Main() method is called.
• Values passed to a method are called arguments. When defined in the method, they are parameters.
• Method parameters can only be used within the method body.
• Method parameters can be optional if given a default value using equals = syntax:

  static void VisitPlanets(int numberOfPlanets = 0)

• When calling a method, pass arguments by position or by name. If using names, use the colon (:) syntax:

  VisitPlanets(numberOfPlanets: 9);

• In method overloading, multiple methods can have the same name, as long as they have different method signatures.
• A method signature is a method’s name and parameter types in order.