Subroutines that Return Values (AQA GCSE Computer Science): Flashcards

Subroutines that calculate and return a value

Subroutines that carry out tasks without returning anything

Functions return a result, procedures just do something

Sends a value back to the main program from a function

Variables created inside a function

Variables only exist inside their specific function

Causes an error - local variables only exist inside function

Break large program into smaller, manageable chunks

Use function multiple times without rewriting code

Update code in one place only

Clear inputs (parameters) and outputs (return values)

Makes code organised, reusable, and easier to maintain