Internship← Ruby Programming learning pathRuby Programming · Module 2 of 10
Variables, types and strings
Ruby is dynamically typed; values carry their type.
📖 Key ideas
- name = "Asha" creates a variable; no type keyword is needed.
- Common types: Integer, Float, String, Symbol, true/false, nil.
- String interpolation: "Hello, #{name}!" works in double quotes only.
- Symbols like :active are lightweight, reusable names.
- nil means "no value"; only nil and false are falsy.
💡 Real-life example: Like labelled jars: the label is the variable name, and the jar knows whether it holds rice, sugar or nothing at all.
nilRuby's "no value"
SymbolA lightweight name like :active
InterpolationInserting values with #{ }
FloatA decimal number