QTP/UFT

Difference between Function and Action in QTP?

Action	Function
Its QTP Feature	Its VB Script Feature
Its collection of VB script statements and returns no value	Its collection of VB script statements and returns single value
Action will have its own Datatable,Object Repository	Functions does not have its own datatable,Object Repository
Actions can have multiple output values	Function can have single return value
Actions can/cannot be reusable	Functions are always reusable
Action file extension is .mts	Function file extension is .vbs
Action parameter type are byval	Function parameter type can be either by val or by ref