What is REPL in context of Node?
REPL stands for Read Eval Print Loop and it represents a computer environment like a window console or unix/linux shell where a command is entered and system responds with an output. Node.js or Node comes bundled with a REPL environment. It performs the following desired tasks.
Eval - Takes and evaluates the data structure
Print - Prints the result
Loop - Loops the above command until user press ctrl-c twice.