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p and puts probably this reference will make everything clear: https://www.garethrees.co.uk/2013/05/04/p-vs-puts-vs-print-in-ruby/#:~:text=Kernel%23p%20is%20less%20well,calling%20to_s%20%2C%20p%20calls%20inspect%20.&text=p%20can%20be%20more%20useful,what%20class%20an%20object%20is.M
p and puts probably this reference will make everything clear: https://www.garethrees.co.uk/2013/05/04/p-vs-puts-vs-print-in-ruby/#:~:text=Kernel%23p%20is%20less%20well,calling%20to_s%20%2C%20p%20calls%20inspect%20.&text=p%20can%20be%20more%20useful,what%20class%20an%20object%20is.A
$ does not exists in ruby as a kind of a special symbol. It can be a part of a variable or a function name, but not more than that. And since it's really weird to name your variable with preceding $ (unless you don't live in PHP reality) - I'd not recommend to use that as a part of a variable or a function/method name in rubyEB
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