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C# - Part 65 - Optional Parameters - Tutorial For Beginners

Optional parameters allow you to define parameters in a method, constructor, indexer, or delegate with default values. When calling the method, you can omit these parameters, and the default values will be used. Key points: Default values: You assign a default value to the optional parameter when defining it. Placement: Optional parameters must always come after required parameters in the parameter list. Omission: If you don't provide a value for an optional parameter when calling the method, the default value is used. Flexibility: Optional parameters increase code flexibility by allowing different ways to call the same method. Example: Consider a CalculateArea method with two required parameters (length and width) and one optional parameter (height) with a default value of 1. You can call this method with two or three arguments, depending on whether you want to calculate the area of a rectangle or a box. Benefits: Simplifies method calls by reducing the number of overloads needed. Improves code readability by making the intent clearer. Enhances code maintainability by centralizing default values. Limitations: Optional parameters can make code less predictable if overused. Default values should be carefully chosen to avoid unexpected behavior. By understanding optional parameters, you can write more concise, flexible, and maintainable C# code.