As you can see above, from here I can step one line at a time and I can step into or out of functions. This is a great tool for helping you figure out what might be broken in a function that you build. You may also add expressions or variables to the "Watch Expressions" section to show you the value of code statements as you progress through your function(s).
Functions Table of Contents
Tables - Functions that are specific to modifying tables.
Lists - Functions that are specific to modifying lists (drop down, select many, select one).
Dates - Functions that are specific to modifying date fields
Other - Function that address a number of different needs