Other
How to Read Graphic Syntax Diagrams
A detailed description of how to read syntax diagrams which are used to describe complex grammar rules in a programming language.
Microsoft
Microsoft: Index Function
Learn about the INDEX function that returns a value or the reference to a value from within a table or range.
Other
W3schools: Java Methods
Learn why to use methods to reuse code: define the code once, and use it many times.
Code.org
Code Studio: Call a Function
Calls a user defined function that takes no parameters, and optionally generates a return value.