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Open learning resource. This is independent subject exploration, not a sample class from the degree providers listed here.
Your exploration prompt
Describe a function that adds two item prices. Identify the inputs and output, then test the idea with one zero-price item.
Take one question forward
Notice whether examples, explanations or practice help you most. Use that observation to ask how a degree programme teaches and supports programming.
Start with a short session rather than rushing through the whole resource. Pause when you find something useful, try the activity and record what remains unclear. If the resource does not match your goal, that is still useful information for your next search.
Official source and viewing options ↗Reviewed 16 October 2026. 30 minutes is a suggested exploration block, not the full resource length.