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

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This resource is designed as a quick revision guide for use by students during a NEA providing that internet access is 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.

Introduction

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.
  • Search for a specific skill
    If you know what you're looking for, use the search bar above the categories list.
Character constants
   

Characters are single letters or digits such as '1', 'H' or '?'

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

Character constants let you give a character 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 KEY_QUIT is set to the character value of 'Q'

CONST CHARACTER KEY_QUIT SET KEY_QUIT TO 'Q'
' Create a new constant called KEY_QUIT Const KEY_QUIT As Char KEY_QUIT = 'Q'
# Create a new constant called KEY_QUIT KEY_QUIT = 'Q'
KEY_QUIT = "Q"
{ no mention of constants in pseudocode reference } KEY_QUIT is character set KEY_QUIT = "Q"

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