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Iteration: count-controlled and condition-controlled loops

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  • 12 questions
  • 41 marks
  • about 40 minutes
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Question types: short answer, multiple choice, true or false.

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A loop in OCR Exam Reference Language has the body print(i) and ends with next i. Identify the first line that makes it output the numbers 1 to 10, and nothing else.

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About this resource

OCR GCSE Computer Science (J277) 2.2.1 Programming fundamentals: iteration (count-controlled and condition-controlled loops). Python lesson 5 of 10 in 2.2 Programming fundamentals, with OCR Exam Reference Language beside the Python: a spot-the-mistakes Do Now, a short key idea, a 9-challenge ladd…

20 slides.

Lesson outline

  1. Do Now: spot the 3 mistakes
  2. Do Now: answers
  3. Key idea: Count-controlled loops: for
  4. Quick check: how many times?
  5. Key idea: Condition-controlled loops: while
  6. Quick check: zero passes
  7. Key idea: do ... until: always at least once
  8. Key idea: Totals, counts and nested loops
  9. Quick check: loops inside loops
  10. Set 1: count-controlled loops
  11. Set 2: totals and counts
  12. Set 3: condition-controlled loops
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