Functions and Scope — Class 12 CBSE Computer Science revision notes
A 3-page visual revision sheet for Functions and Scope, written for Class 12 CBSE Computer Science. Formulas, diagrams and the traps that cost marks, laid out to be read the night before rather than the term before. Free, and it opens inside CapCompass.
What this Functions and Scope sheet covers
- Three kinds of functions
- def and return
- Spotting each kind in code
- Built-in
- Module
- User-defined
- Parameters vs arguments
- A function that returns nothing, still returns something
- Positional and keyword arguments
- Default argument values
- The mutable default argument
- Tracing three calls to greet
- Positional vs Keyword vs Default
- Positional
- Keyword
- Default
- LEGB, where a name is found
- Local
- Enclosing
- Global
- Local vs global scope
- The global keyword
- Passing a mutable list into a function
- Traps that cost marks
- Tricks that save time
How CapCompass uses this sheet
These notes are not a standalone PDF. CapCompass plans Computer Science chapter by chapter against your real exam dates and free hours, and when the plan reaches Functions and Scope the sheet opens inside the study block itself — at the page covering the sub-topic that block is on, with the timer still running. Revision arrives at the moment the plan says revise, instead of having to be gone looking for.