Pearson Edexcel GCSE Computer Science (1CP2)Specification point 6.2.2

Edexcel 1CP2 6.2.2: Sequence, selection, repetition and iteration

The free BugBot lessons that teach this point, a robot to try it on, and the past-paper questions that test it.

Lessons that teach it

1. F1.1 What a program is Programming basics
   Instructions, one at a time, top to bottom. Running code and reading what comes back.
2. F2.4 Nested selection and match Decisions and loops
   Decisions inside decisions, and choosing by exact value with a case statement.
3. F2.5 Count-controlled loops: for Decisions and loops
   range, the loop variable, and repeating a known number of times.
4. F2.6 Condition-controlled loops: while Decisions and loops
   Looping until something changes, break, and loops that never end.
5. F3.4 Iterating over a list Strings, lists and records
   Loops over items and indexes, totals, counts, min and max, and linear search.

Try it on a robot

The task from F1.1 What a program is, running here. Change the program and press Run.

Past paper questions on this

Real exam questions that test this, each worked through with a program you can run.

• AQA 8525 June 2025 Paper 1, Question 1: Operators in a short program, and a trace of a while loop that doubles 7 marks
• AQA 8525 June 2025 Paper 1, Question 3: A coaching cost with three price bands 8 marks
• AQA 8525 June 2025 Paper 1, Question 5: Data types, and five inputs rewritten as a loop with one 8 marks
• AQA 8525 June 2025 Paper 1, Question 9: Which of five algorithms correctly total an array 2 marks
• AQA 8525 June 2024 Paper 1, Question 5: The output of a nested IF for three pairs of inputs 3 marks
• AQA 8525 June 2024 Paper 1, Question 8: Trace a loop over three arrays that uses DIV 6 marks
• AQA 8525 June 2024 Paper 1, Question 11: Authenticate against two username and password pairs until valid 7 marks
• AQA 8525 June 2024 Paper 1, Question 12.6, 12.7: Use given subroutines to check a row and to play until solved 10 marks
• AQA 8525 June 2024 Paper 1, Question 15: Move 1 or 2 along a row of cells, back to 0 on an X or past the end 8 marks
• AQA 8525 June 2023 Paper 1, Question 2: Read a nested WHILE loop that uses integer division 3 marks
• AQA 8525 June 2023 Paper 1, Question 6: Fill the gaps in a login routine 4 marks
• AQA 8525 June 2023 Paper 1, Question 12.2: Write your own linear search 7 marks

The specification is Edexcel's own document; this page says which of our lessons teach point 6.2.2 and is not endorsed by the board.