[npm] Installing npm packages

Installing npm packages 

There are two ways to install npm packages

- If you want to depend on the package from your own module using something like node.js require, then you want to install locally, which is npm install's default behavior

- If you want to use it as a command line tool, something like the grunt CLI, then you want to install it globally

1. Locally

- This will create the node_modules directory in your current directory and will download the package to that directory

1_1. Example

1_2. Using the installed package

Once the package is in node_modules, you can use it in your code.

it you are creating a Node.js module, you can require it

- Run the code using node index.js It should output [2, 3]

2. Globally