A dollar sign ($)as the first character in a variable means it is a class variable that can be referenced in any procedure within the class.

Name: A dollar sign ($)as the first character in a variable means it is a class variable that can be referenced in any procedure within the class.
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In programming languages like Ruby, a dollar sign ($) as the first character in a variable indicates a global variable, not a class variable.

A Dollar Sign ($)As the First Character in a Variable