This study notes covers Exam Tips within Variable Scope for GCSE Computer Science. Revise Variable Scope in 3.2 Programming for GCSE Computer Science with 18 exam-style questions and 10 flashcards. This topic appears less often, but it can still be a useful differentiator on mixed-topic papers. It is section 6 of 7 in this topic. Use this study notes to connect the idea to the wider topic before moving on to questions and flashcards.
Exam Tips
- Best practice: Use local variables when possible
- Parameters: Are local to the function
- Common mistake: Trying to access local variable outside its function
Practice questions for Variable Scope
Where can a local variable be accessed?
Identify and explain the scope error in this pseudocode: function calculateTotal(price, quantity) local total = price * quantity endfunction calculateTotal(10, 5) output total
Quick recall flashcards
What is a global variable?
A variable declared outside all subprograms, accessible anywhere in the program
What is variable scope?
Where a variable can be accessed in the code