Rules for Naming Variables
You must not use the program name as the name of a variable.
You must not use a keyword (reserved word) as the name of a variable.Tip: You can test the identifier by typing it in a new line before begin. If it is a keyword (e.g.) message, then it will be emboldened in the editor and must not be used. Remember to delete the word after you have tested it!
An identifier must begin with a letter or an underscore "_" and cannot contain spaces.
Letters, digits, and underscores are allowed after the first character.
|a||Y||no clear meaning|
|2LittleBirds||N||not allowed to start with a number|
|begin||N||begin is a reserved word|
|repeat||N||repeat is a reserved word|
|box#||N||invalid character "#"|
|enough?||N||invalid character "?"|