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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Not equal to

You can test if two expressions are the same using the equal to or not equal to operator.

An expression can be a variable or combination of variables & data (e.g. 1 + 1)

An operator is a symbol that means add, subtract or something similar.

This example asks the user to enter a temperature  of a bath (in degrees Celsius) and then follows the following rules:

Equal to 37 degrees: says "Perfect - that's body temperature"

Not equal to 37 degrees: "Not body temperature"

SEND "What's the temperature of the bath?" TO DISPLAY RECEIVE temperature FROM (INTEGER) KEYBOARD IF temperature = 37 THEN SEND "Perfect - that's body temperature" TO DISPLAY END IF IF temperature <> 37 THEN SEND "Not body temperature" TO DISPLAY END IF
Dim temperature As Integer temperature = InputBox("What's the temperature of the bath?") If temperature = 37 Then MsgBox("Perfect - that's body temperature") End If If temperature <> 37 Then MsgBox("Not body temperature") End If
temperature = int(input("What's the temperature of the bath?") if temperature == 37: print("Perfect - that's body temperature") if temperature != 37: print("Not body temperature")
temperature = int(input("What's the temperature of the bath?") if temperature == 37 then print("Perfect - that's body temperature") endif if temperature != 37 then print("Not body temperature") endif
{ user input not specified in eduqas pseudocode reference } output "What's the temperature of the bath?" temperature is integer temperature = input if temperature == 37 then output "Perfect - that's body temperature" end if if temperature <> 37 then output "Not body temperature" end if
Console.WriteLine("What's the temperature of the bath?"); int temperature = int.Parse(Console.ReadLine()); if(temperature == 37) { Console.WriteLine("Perfect - that's body temperature"); } if(temperature != 37) { Console.WriteLine("Not body temperature"); }