how to install npm windows code example

Example 1: intall npm

npm install -g npm

Example 2: install npm mac

brew install node

Example 3: npm latest version windows

npm-windows-upgrade --npm-path "C:\nodejs"

Example 4: what is npm install

npm install module-name
npm i module-name
puts module-name package (js library file) 
into node_modules folder
so you can require it in node app