title: Why there is no 'sign' method in Math object of typescript?
body: <p>I noticed that there is no <code>Math.sign</code> in TypeScript, however it exists in pure JavaScript. I know there are other ways of getting the sign of a number but I am really curious about the reason why the authors didn't include this method.</p>
  
  <p>This is what my compiler says if I try to use it:</p>
  
  <p><a href="https://i.stack.imgur.com/N2nSZ.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/N2nSZ.jpg" alt="enter image description here"></a></p>