December 2019
Beginner
496 pages
15h 37m
English
Here are the rules for variable names (also called identifiers):
Aside from letters, numbers, and the underscore character, no other characters can be used. Spaces, punctuation, and other characters are not allowed in variable names:
~ ` ! @ # $ % ^ & * ( ) ; - : " ' < > , . ? / { } [ ] + = /
The only special character that’s allowed ...