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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    Each skill has example code in VB.NET, Python, C# and Pseudocode for Edexcel, Eduqas and OCR GCSE.
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Getting a character from a string

A string is some text such as "Hello"

A character is a single letter or digit.

Sometimes it's useful to get the 1st, 2nd or whichever character from a string.

This example gets the first character of a string called name and stores it into a variable called first_letter

STRING name SET name TO "Bob" CHAR first_letter SET first_letter TO name[0]
Dim name As String name = "Bob" Dim first_letter As Char ' get the first character from name first_letter = name(0)
name = "Bob" # get the first character from name first_letter = name[0]
name = "Bob" first_letter = name.substring(0,1)
{ not specified in eduqas pseudocode reference }
string name = "Bob"; // get the first character from name char firstLetter = name[0];