Master REPL in NodeJS in 15 Minutes| READ, Eval, Print & Loop in NodeJS | Master Nodejs #1
Node.js is an open-source server-side Javascript run-time environment built on Chrome’s JavaScript Engine(V8). Node.js is used for building fast and scalable applications and is an event driven, non-blocking I/O model.
REPL (READ, EVAL, PRINT, LOOP) is a computer environment similar to Shell (Unix/Linux) and command prompt. Node comes with the REPL environment when it is installed. System interacts with the user through outputs of commands/expressions used. It is useful in writing and debugging the codes. The work of REPL can be understood from its full form:
Read : It reads the inputs from users and parses it into JavaScript data structure. It is then stored to memory.
Eval : The parsed JavaScript data structure is evaluated for the results.
Print : The result is printed after the evaluation.
Loop : Loops the input command. To come out of NODE REPL, press ctrl+c twice
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