In each class of AwesomeWM documents there is two section. Methods and Functions. Whats the difference between the two. I searched in the lua document and can't found anything there either. Here is a sample
Functions:
awful.screen.getbycoord (x, y) Return the screen index corresponding to the given (pixel) coordinates.
awful.screen.focus (_screen) Move the focus to a screen.
Methods
screen:instances () Get the number of instances.
screen:screen () Iterate over screens.
screen:count () Get the number of screens.
Thanks