REPL in Node.js stands for Read, Eval, Print, and Loop. It represents a computer environment such as a window console or Unix/Linux shell where any command can be entered and then the system can respond with an output. Node.js comes bundled with a REPL environment by default. REPL can perform the below-listed tasks:

• Read: Reads the user’s input, parses it into JavaScript data-structure and then stores it in the memory.
• Eval: Receives and evaluates the data structure.
• Print: Prints the final result.
• Loop: Loops the provided command until CTRL+C is pressed twice.