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Nodejs - Environment Setup


Try it Option Online
You really do not need to set up your own environment to start learning Node.js. Reason is very simple, we already have set up Node.js environment online, so that you can execute all the available examples online and learn through practice. Feel free to modify any example and check the results with different options.

Try the following example using the Try it option available at the top right corner of the below sample code box (on our website):

/* Hello World! program in Node.js */
console.log("Hello World!");

For most of the examples given in this tutorial, you will find a Try it option, so just make use of it and enjoy your learning.

Local Environment Setup

If you want to set up your environment for Node.js, you need to have the following two software on your computer, (a) a Text Editor and (b) the Node.js binary installables.


Text Editor


You need to have a text editor to type your program. Examples of text editors include Windows Notepad, OS Edit command, Brief, Epsilon, EMACS, and vim or vi.

The name and version of text editors can vary from one operating system to another. For example, Notepad will be used on Windows, and vim or vi can be used on Windows as well as Linux or UNIX.

The files you create with your editor are called source files and they contain the program source code. The source files for Node.js programs are typically named with the extension ".js".

Before you start programming, make sure you have one text editor in place and you have enough experience in how to write a computer program, save it in a file, and finally execute it.

The Node.js Runtime

The source code that you would write in a source file is simply javascript. The Node.js interpreter interprets and executes your javascript code.

Node.js distribution comes as a binary installable for SunOS, Linux, Mac OS X, and Windows operating systems with the 32-bit (386) and 64-bit (amd64) x86 processor architectures.

The following section explains how to install Node.js binary distribution on various OS.

Download Node.js Archive

Download the latest version of Node.js installable archive file from Node.js Downloads. At the time of writing this tutorial, following are the versions available on different OS.
OSArchive name
Windowsnode-v0.12.0-x64.msi
Linux

Mac
node-v0.12.0-linux-x86.tar.gz

node-v0.12.0-darwin-x86.tar.gz
SunOSnode-v0.12.0-sunos-x86.tar.gz
Installation on UNIX/Linux/Mac OS X and SunOS

Based on your OS architecture, download and extract the archive node-v0.12.0-osname.tar.gz into /tmp, and then move the extracted files into /usr/local/nodejs directory. For example:

$ cd /tmp
$ wget http://nodejs.org/dist/v0.12.0/node-v0.12.0-linux-x64.tar.gz
$ tar xvfz node-v0.12.0-linux-x64.tar.gz
$ mkdir -p /usr/local/nodejs
$ mv node-v0.12.0-linux-x64/* /usr/local/nodejs

Add /usr/local/nodejs/bin to the PATH environment variable.

OSOutput
Linux?export PATH=$PATH:/usr/local/nodejs/bin
Mac

FreeBSD
export PATH=$PATH:/usr/local/nodejs/bin

export PATH=$PATH:/usr/local/nodejs/bin
Installation on Windows

Use the MSI file and follow the prompts to install Node.js. By default, the installer uses the Node.js distribution in C:\Program Files\nodejs. The installer should set the C:\Program Files\nodejs\bin directory in Window's PATH environment variable. Restart any open command prompts for the change to take effect.

Verify Installation: Executing a File

Create a js file named main.js on your machine (Windows or Linux) having the following code.

/* Hello, World! program in node.js */
console.log("Hello, World!")

Now execute main.js using Node.js interpreter to see the result:

$ node main.js

If everything is fine with your installation, it should produce the following result:

Hello, World!
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