What is the Iterable interface used for?

Question

I am a beginner and I cannot understand the real effect of the Iterable interface.

Answer 1

An interface is at its heart a list of methods that a class should implement. The iterable interface is very simple -- there is only one method to implement: Iterator(). When a class implements the Iterable interface, it is telling other classes that you can get an Iterator object to use to iterate over (i.e., traverse) the data in the object.