Introduction
When preparing for the IB Computer Science IA, many students ask: “How many lines of code do I need for a good grade?” The truth is, the IB does not grade your IA based on a line count. Some students write 200 lines of code and score a 7, while others write 1,000 lines and still fall short.
What examiners really care about is whether your code demonstrates appropriate complexity, problem-solving, and alignment with the client’s needs. In this article, we’ll clarify how much code is enough, what “complexity” means in IB terms, and how RevisionDojo helps you strike the right balance.
Quick Start Checklist
- There is no minimum or maximum line count requirement.
- Focus on quality, not quantity of code.
- Demonstrate algorithmic thinking and data handling.
- Include annotated code snippets in your documentation.
- Ensure your project scope is manageable yet meaningful.
What Examiners Actually Look For
Instead of counting lines of code, examiners focus on:
- Problem-solving – Does your code clearly solve the client’s problem?
- Complexity – Are there algorithms, data structures, or features beyond simple input-output?
- Clarity – Is your code readable and documented?
- Integration – Do features connect logically, rather than looking like random add-ons?
Examples of Code Complexity
You don’t need thousands of lines of code — you need the right features. For example:
- A with randomization, scoring, and report features (200–300 lines).
