Glossary term
What is REPL (Read–Eval–Print Loop)?
REPL stands for Read–Eval–Print Loop.
In JavaScript Core
The interactive prompt you get from typing node with no file: type a line, see the result, repeat.
Learn it properly · JavaScript CoreLesson 1: How JS Works: The Execution ContextEverything in JavaScript happens inside an execution context. How the global one is created — memory phase first, then code phase — and why that order explains almost everything that follows.In DSA
The prompt where you type one line and see the result at once. Type node with no file, or use the browser console.
Learn it properly · DSALesson 1: What a Program Is, and How to Run OneA program is a list of instructions run top to bottom. Run your first JavaScript, read its output, and learn to predict exactly what prints.