Introduction

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Basic Input / Output — `console.log`, `prompt`

Input and output (I/O) are the most fundamental operations in any program. Input is data the program receives. Output is data the program sends out — to the screen, console, or another system.

In JavaScript, the basic I/O tools differ depending on the environment:

Environment	Output	Input
Browser	`console.log`, `alert`	`prompt`, `confirm`
Node.js	`console.log`	`process.stdin`, readline module

Input/Output in Javascript

Introduction

Basic Input / Output — console.log, prompt

Basic Input / Output — `console.log`, `prompt`