Subprogram
A collection of commands that are given a name.
def
A command that creates a function or subprogram.
Main
The central part of the program.
Parameter
A variable used to send information to a subprogram.
return
A keyword that tells a function or subprogram what value to send back.
local variable
A variable that exists only inside a function.
Tracing code
Reading through code to find errors and predict results.