Difference between a module and a template?

[jbalcony]

Hi - Can someone explain the difference between a module file and a template file (tpl_)? Thanks.

Jason

[Website Rob]

Not sure I understand your question.

Although you defined a Template file you didn't define a Module file, no basis for comparison.

Anyway, a Module is to alter previously installed files in some way. Be it a Template file or a default Zen Cart file makes no difference to the Module, depending upon the use of the Module.

[schoolboy]

Generally speaking, a module influences a behaviour of your zenshop, while a template influences an appearance.

eg:

• a payment MODULE will enable a method (behaviour) for customers to pay for their purchases.
  
• the "classic green" TEMPLATE positions elements on your webpage and applies layout structures, colours and design features.

[DrByte]

If you're referring to files in /includes/modules vs files in /includes/templates ... then ... whereas the files in /includes/modules/ are used to extract data from the database, crunch numbers, do logic-processing, and prepare data to be sent for display; the files in /includes/templates/ are used simply to render the display of the data built by the modules.
Essentially it boils down to templates being used only for display, and modules being used for business logic and intelligence.