seniorRuby
What is the difference between Ruby execution in script mode vs REPL (IRB)?
Updated May 17, 2026
Short answer
Script mode executes full file; IRB evaluates expressions interactively with persistent context.
Deep explanation
In script mode, Ruby parses and executes the entire file. In IRB, each line is evaluated in an interactive session with persistent bindings, allowing incremental execution and introspection.
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