Processing provides some predefined methods, which are predefined blocks of code that can be called by naming the method and passing an appropriate list of arguments.

• Pattern:

  methodName(argumentList);

  where:
  • methodName is the predefined name (also called an identifier) of a particular method.
  • argumentList is a list (possible empty) of items called arguments expected by the method that are in a specified order, enclosed in parentheses, and separated by commas.

• As an example, consider the point() method, which is predefined by Processing:

  • Pattern for the point() method:

    point(xPosition, yPosition);

    where:
    • xPosition is the x coordinate of the screen pixel where the point should be centered, and
    • yPosition is the y coordinate of this same screen pixel.

  • Calling the point() method:

    point(25, 50);

    Here, the method point() is called, passing two literal arguments, 25 and 50, which specify the x and y coordinates of the point being drawn respectively.