title: Difference between npx and npm?
body: <p>I have just started learning React, and Facebook helps in simplifying the initial setup by providing the <a href="https://github.com/facebook/create-react-app" rel="noreferrer">following ready-made project</a>.  </p>
  
  <p>If I have to install the skeleton project I have to type <code>npx create-react-app my-app</code> in command-line.</p>
  
  <p>I was wondering why does the Facebook in Github have <code>npx create-react-app my-app</code> rather than <code>npm create-react-app my-app</code>?</p>