title: 'tsc' is not recognized as an internal or external command,operable program or batch file
body: <p>I am a beginner to Typescript. To begin with I have created "types.ts" and referred in index.html file. And I have installed typescript globally using
   <code>npm install -g typescript</code> in <strong>Visual studio Code terminal window.</strong></p>
  
  <p>After installation when I tried to use <code>tsc -v</code> , It gives me the error</p>
  
  <pre><code>'tsc' is not recognized as an internal or external command,operable program or batch file.
  </code></pre>
  
  <p>I searched and tried different options. I was adding following path as a environment variable.</p>
  
  <p>C:\Users\\AppData\Roaming\npm\tsc.cmd</p>
  
  <p>Then I restarted the machine still it gives me the same error.</p>