Web Reference: What's a variable in Ruby & how do you use it? That's exactly what you'll discover inside this guide. You'll also learn about types of variables, local variables, global, etc. Mar 26, 2026 · A practical tour of Ruby's five variable scopes, the core type hierarchy, runtime type checking, duck typing, and type conversions. Variables are the memory locations, which hold any data to be used by any program. There are five types of variables supported by Ruby. You already have gone through a small description of these variables in the previous chapter as well.
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