Ruby Basics for AI Developers — Variables, Methods, Blocks, Classes

You don't need to master Ruby before touching AI. You need just enough to read code, write functions, and not panic when you see a block. This is that "just enough." Variables: No Types, No Ceremony Ruby doesn't make you declare types. You just assign: name = "AgentQ" age = 3 alive = true temperature = 0.7 That's it. No let , no const , no String name = . Ruby figures it out. Constants start with a capital letter (convention: ALL_CAPS): MAX_TOKENS = 4096 MODEL_NAME = "gpt-4" Ruby will warn you if you reassign a constant. It won't stop you, because Ruby respects your autonomy. Methods: Functions With Less Noise def greet ( name ) "Hello, #{ name } !" end puts greet ( "Ruby" ) # => Hello, Ruby! Notice: no return . Ruby returns the last expression automatically. You can use return , but idiomatic Ruby skips it when unnecessary. Default arguments work exactly like you'd expect: def call_model ( prompt , temperature: 0.7 , max_tokens: 1000 ) # imagine API call here puts "Prompt: #{ prompt }