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 reference or revision guide. 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, C# and pseudocode and is aimed primarily at teachers & students working towards a GCSE in Computer Science

VB.NET, Python and C# are 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.

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Displaying a mixture of text and variables

Variables let your program store data of a particular data type.

Integer variables store whole numbers. String variables store text.

Sometimes you need to combine text with integer variables and string variables when you display it to the screen.

This example has a string variable called name (set to "Bob") and an integer variable called score (set to 10). It combines both variables with some text to display the message "Bob has 10 points"

INTEGER score SET score TO 10 STRING name SET name TO "Bob" SEND name & " has " & score & " points"
Dim score As Integer score = 10 Dim name As String name = "Bob" MsgBox(name & " has " & score & " points")
score = 10 name = "Bob" print(name + " has " + str(score) + " points")
score = 10 name = "Bob" print(name + " has " + str(score) + " points")
score is integer set score = 10 name is string set name = "Bob" output name + " has " + score + " points"
int score = 10; string name = "Bob"; Console.WriteLine(name + " has " + score + " points");