Parameters and arguments

A parameter is a variable in a method definition. After the name of the method, zero or more parameters are defined.

When a method is called, the arguments are the data you pass into the method's parameters.

For examples of methods with parameters – methods that receive arguments – see Methods

When calling a method, arguments are passed to the method. Which arguments can be passed depends on which parameters have been defined in the method definition.
When more than one parameter is needed, the arguments must be passed in sequence, or by mentioning the name of the parameter. In the case of a named parameter, this parameter and its value are separated by a colon.
- Example 1: passing arguments in sequence:
  methodOne("", 0, false, 12); Even when the first three paramaters have default values, when passing the fourth (12), the others must be passed first.
- Example 2: passing arguments to named parameters:
  methodOne(amount: 12); The fourth parameter (named amount) is passed directly with value 12.
Often the parameters are complex types (combined, existing of more than one value). They are classes that need to be instantiated with new.
- Example: maxSize: new Size(10, 10); The (named) parameter maxSize takes as arguments a class, named Size(). Between brackets the constructor parameters of this class will be passed, in our example 10 and 10 for width and height.

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Article ID: 205
Created: Wed, Oct 30, 2019
Last Updated: Wed, Nov 27, 2019

Online URL: https://wiki-ai-framework.abstract-it.nl/article/parameters-and-arguments-205.html