Question

How is a function used?

Answer 1

a function is used to  do something like when talking opening your mouth is a function

Answer 2

The Inputs - called parameters. Describe what data is necessary for the function to work and gives each piece of data a Symbolic Name for use in the function. The Output - Usually one (but sometimes zero or sometimes many) values that are calculated inside the function and "returned" via the output variables. hope this helped:)