QTP Actions Vs Functions

Actions	Functions
An action can have object repository associated with it.	Functions do not use object repository.
You can select one of the following data types as parameter for actions: String, Boolean, Date, Number, Password and Any.	Functions can accept arrays, objects and even another function calls etc. as Parameters. Example of “function call” as an argument: Function myfunction2(argument1,argument2) d=argument1 - argument2 myfunction2=d End Function Function myfunction(argument1,argument2) c=argument1 + argument2 myfunction=c End Function a = myfunction (myfunction2(5,2),3) msgbox a
Each time you add a new action to the test, a new action sheet is added to the Data Table. An action consists of its own test script, including all of the steps recorded in that action, and any objects in its local object repository. Each action has its folder containing Script file, snapshots folder (if any), Object Repository file and much more.	Function only has its code associated with it and nothing else.
There are three kinds of actions: Non-reusable action Reusable action External action	VBScript has two kinds of procedures; the Sub procedure and the Function procedure. Of course there are built-in functions also like Date, Len, and InStr etc.