title: Angular JS 2 Difference between npm and ng(Angular-Cli) (Built tool)
body: <p>In angularjs 2 what is main difference between NPM and NG (anglular-cli). If By NPM if we can built our application and  it will work then what is the need of NG Built (angular-cli).</p>
  
  <p>npm start vs ( ng serve or ng built)</p>