Instance variable: @abc Class variable: @@def Method: nil? Method or variable: my_var Global variable: $global Constant: String Decimal Integer: 1234 Octal Integer: 501 Hex Integer: 43987 Binary Integer: 172 Comment: # here comes a comment Decimal Integer: 1234 Octal Integer: 501 Hex Integer: 43987 Binary Integer: 172 Method: nil? Method: sort! Constant: Array Error: '$' Method: my_var= Instance variable: @var Comment: # this is a variable Error: '@' Decimal Integer: 3 Octal Integer: 0 Method or variable: d Decimal Integer: 35623 Method or variable: _ Octal Integer: 0 Method or variable: b_ Binary Integer: 203 Decimal Integer: 234