Categories: All Variables and Constants  String manipulation  Builtin functions  Input and output  Arrays  Conditional logic  Repetition / Iteration  Functions / Procedures 


This resource is designed as a quick revision guide and must not be used by students during a NEA where internet access is not allowed. It has not been endorsed by any exam boards. If you spot any mistakes, please let me know and I'll fix them asap.


This website aims to give a quick reference for VB.NET, Python and pseudocode and is aimed primarily at teachers & students working towards a GCSE in Computer Science

VB.NET and Python are both programming languages designed to be understood and followed by computers. Pseudocode is not a programming language: it's written to be understood by humans so that they can turn it into any programming language.

Each exam board has published a document saying how they'll write pseudocode in their exams. The whole idea of syntax (a set of rules) for pseudocode is silly - it's not designed to be a programming language that is run by a computer. With this in mind, all exam boards state that you don't have to follow the syntax for 'their' version of pseudocode when you write out your own algorithms, but you should be able to understand their version of pseudocode when reading an algorithm in an exam.

Top Tips:

  • Explore the different categories of skills at the top of this page
    Each skill has example code in VB.NET, Python and Pseudocode for Edexcel, Eduqas and OCR GCSE.
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Boolean constants

Boolean means one of two values (usually either True or False).

Constants store a value that is set once and then never changes.

Boolean constants let you give a boolean value a name so you can use it to make your code easier to read or to set options for your code that the user wont be able to change.

In this example, a constant called CHEAT_MODE is set to the boolean value of True

Const CHEAT_MODE As Boolean = True
CHEAT_MODE = false
{ no mention of constants in pseudocode spec } CHEAT_MODE is boolean set CHEAT_MODE = FALSE