IGCSE CS Pseudocode

Every lesson runs in your browser — write real code, press Run, and the tasks check themselves. Free, no account needed, with translated notes paired with English.

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Lessons in this course

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1. OUTPUT and sequence 01 · 3 required tasks · ★
2. Variables, DECLARE and CONSTANT 02 · 4 required tasks · ★
3. INPUT and data types 03 · 3 required tasks · ★
4. Arithmetic, DIV and MOD 04 · 4 required tasks · ★
5. Selection: IF 05 · 3 required tasks · ★★
6. Selection: CASE 06 · 3 required tasks · ★★
7. Iteration: FOR 07 · 3 required tasks · ★★
8. Iteration: WHILE and REPEAT 08 · 3 required tasks · ★★
9. String handling 09 · 3 required tasks · ★★
10. 1-D arrays 10 · 4 required tasks · ★★
11. 2-D arrays 11 · 3 required tasks · ★★★
12. Procedures 12 · 4 required tasks · ★★★
13. Functions 13 · 3 required tasks · ★★★
14. Putting it together 14 · 3 required tasks · ★★★
15. Text files 15 · 3 required tasks · ★★★
16. 16 Logic: AND, OR, NOT 3 required tasks · ★★
17. 17 Nested decisions 3 required tasks · ★★★
18. 18 ROUND, RANDOM and a trace 3 required tasks · ★★★
19. 19 Bubble sort 3 required tasks · ★★★★

Language reference

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