title: Always return positive value
body: <p>I have a number it could be negative or positive but I simply want to return the positive value.</p>
  
  <pre><code>-4 -&gt; 4
  5 -&gt; 5
  </code></pre>
  
  <p>I know I can do a simple if check, see if its zero then return it <code>*-1</code> but I can't remember for the life of me what the actual <code>Maths</code> operator is!</p>
  
  <p>Can anyone tell me what it is?</p>