See also: Automating LEAP with the API,
The LEAPVariable class represents a Variable for a single Branch, whereas LEAPVariables is a collection of all valid Variables for a given Branch.
You can get access to a LEAPVariable from the Variables collection:
LEAPVariables(VariableName or Index), specifying either the name of the variable or a number from 1 to LEAPVariables.Count, e.g., LEAP.Branch("Demand\Househods").Variables("Activity Level") or LEAP.Branch("Demand\Househods").Variables(1)
Please use the Script Editor for documentation of the properties and methods of the Variables API. The right-hand pane of the Script editor fully enumerates all collections and objects in the LEAP API.