title: store Math.PI in JSON
body: <p>In an app I'm writing there is some logic which involves multiplying a number stored in a variable by several constant values.  I'd like to move the constant values to a JSON config file so that more can be added easily in the future without changing the code; however, one of the constants is <code>Math.PI</code>.</p>
  <p>When an attempt is made to store the constants in a JSON file like this:</p>
  <pre><code>{
    &quot;multipliers&quot;: {
      &quot;a&quot;: 1000,
      &quot;b&quot;: 2000,
      &quot;c&quot;: Math.PI
    }
  }
  </code></pre>
  <p>a red squiggly line appears under <code>Math.PI</code> with an error message that says &quot;Value expected&quot;.</p>
  <p>Is there a way to do this?</p>
  <p>Important note: it is necessary to use <code>Math.PI</code> in the logic rather than a rounded number for pi.</p>