for CIE IGCSE 0478 & A Level 9618

The pseudocode editor that actually runs your code.

Write Cambridge pseudocode in a proper editor with syntax highlighting, instant execution and a variable inspector. Free, no account, nothing to install.

Open editor →Revision hub Build my study plan

editor.pseudo

DECLARE Count : INTEGER
FOR Count <- 1 TO 10
  IF Count MOD 2 = 0 THEN
    OUTPUT Count, " is even"
  ENDIF
NEXT Count

output

2 is even
4 is even
6 is even
8 is even
10 is even

Cambridge syntax, exactly

DECLARE, CASE OF, REPEAT UNTIL, BYREF parameters, arrays and record types — matched to the 0478 and 9618 specifications.

It really runs

A full interpreter in your browser. Loops, procedures, functions and string handling all execute, with clear errors pointing at the line.

Variable inspector

After every run, see the value and type of every variable and array element, so you can prove your logic to yourself.

revision hub

Not just a compiler — a full A* course.

Exam structure, timing strategy, examiner insight, full topic guides and worked past questions with mark schemes — for IGCSE 0478 Papers 1 and 2, and AS & A Level 9618 Papers 1 to 4. Paper 4 solutions are written in Python.

IGCSE

0478 / 0984Two papers: theory, and algorithms with programming.

0478 / 0984 Paper 1

Computer Systems

6 topic guides · 4 worked questions · Written English (short-answer and structured questions)

0478 / 0984 Paper 2

Algorithms, Programming and Logic

7 topic guides · 2 worked questions · Cambridge pseudocode

AS & A Level

9618Four papers: AS theory and problem-solving, A2 theory and practical.

9618 Paper 1

Theory Fundamentals

8 topic guides · 4 worked questions · Written English (no programming code required)

9618 Paper 2

Fundamental Problem-solving and Programming Skills

9 topic guides · 2 worked questions · Cambridge pseudocode (Insert provided)

9618 Paper 3

Advanced Theory

7 topic guides · 4 worked questions · Written English

9618 Paper 4

Practical (A Level)

10 topic guides · 3 worked questions · Python (console mode)

Why is it free?

Pseudocode tools are usually buried in adverts or hidden behind a subscription. This one runs entirely inside your browser, so it costs nothing to keep online — and students get something that simply works before an exam.