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 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.

Introduction

This website aims to give a quick reference for VB.NET, Python and C# and pseudocode and is aimed primarily at teachers & students working towards a GCSE or A Level 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.

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  • Explore the different categories of skills at the top of this page
    Each skill has example code in Python, C#. You can also enable VB.NET and Pseudocode for OCR GCSE if you'd find that useful.
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Skill
Description
VB.NET
Python
C#
Displaying text
    

Most programs need to output text to the user. 

This example displays the text "Hello" to the screen

# display text print("Hello")
// display text Console.WriteLine("Hello");
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"

score = 10 name = "Bob" print(name + " has " + str(score) + " points")
int score = 10; string name = "Bob"; Console.WriteLine(name + " has " + score + " points");

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