In data processing terms an 'Editor' is an application that allows you to write computer code in the form of text.
A good editor will also use colour to highlight keywords within that computer language. This is very handy for spotting typing mistakes.
An editor may also help you lay out the code neatly at the press of a button.
'Notepad' is a very basic text editor as it has none of these facilities but in theory you could write code for a web page or a computer application with it.
But normally you would purchase a dedicated editor for the job in hand.
Note that a 'word-processor' such as Word is not an editor as it has many hidden codes to format the text and so on. An editor does not usually have any hidden code, just pure text.
Challenge see if you can find out one extra fact on this topic that we haven't already told you
Click on this link: Editor