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35. REPL and Interactive Consoles
Using the runtime REPL for quick experiments and exploration of language features.
1 min read Chapter 35 of 99
JavaScript
REPL and Interactive Consoles
A REPL is an interactive prompt where you type JavaScript expressions and immediately see results.
"I want to try ideas quickly without writing a whole file and running a build."
A REPL (Read–Eval–Print Loop) reads your input, evaluates it in the runtime, prints the result, and loops — letting you experiment with expressions, APIs, and snippets interactively.
"I want to try ideas quickly without writing a whole file and running a build."
A REPL (Read–Eval–Print Loop) reads your input, evaluates it in the runtime, prints the result, and loops — letting you experiment with expressions, APIs, and snippets interactively.