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 and must not be used by students during a NEA where internet access is not 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.

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    Each skill has example code in VB.NET, Python and Pseudocode for Edexcel, Eduqas and OCR GCSE.
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    If you know what you're looking for, use the search bar above the categories list.
Greater than or less than
   

If you need to compare two expressions you will need the greater than or less than operators.

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 password and displays how strong that password is based purely on the length:

Less than 5 characters: weak

More than or equal to 8 characters: strong

Otherwise: medium

SEND "Please enter a password" TO DISPLAY RECEIVE password FROM (STRING) KEYBOARD IF LENGTH(password) >= 8 THEN SEND "strong" TO DISPLAY ELSE IF LENGTH(password) < 5 THEN SEND "weak" TO DISPLAY ELSE SEND "medium" TO DISPLAY END IF END IF
Dim password As String password = InputBox("Please enter a password") If Len(password) >= 8 Then MsgBox("strong") Else If Len(password) < 5 Then MsgBox("weak") Else MsgBox("medium") End If End If
password = input("Please enter a password") if len(password) >= 8: print("strong) else: if len(password) < 5: print("weak") else: print("medium")
password = input("Please enter a password") if password.length >= 8 then print("strong) else if password.length < 5 then print("weak") else print("medium") endif endif
{ user input not specified in eduqas pseudocode reference } { neither is string length... } output "Please enter a password" password is string set password = input if password.length >= 8 then output "strong else if password.length < 5 then output "weak" else output "medium" end if end if

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