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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Skill
Description
VB.NET
Python
C#
Write a string to a file
   

A string is some text that can contain more than one letter, number, space or punctuation mark.

This example writes the string "Hello world" to the file "output.txt"

# open the file f = open("output.txt", "w") # write to the file f.write("Hello world") # close the file so it can be read by other programs f.close()
// add this to the top of your file using System.IO; // Open the file using(StreamWriter sw = new StreamWriter("output.txt")) { // write to the file sw.WriteLine("Hello world"); }

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