>isNaN()</code> can also be used.
    </p>



    <h5 id="isNeg">
      isNegative<code class='inset'>.isNeg() &rArr; <i>boolean</i></code>
    </h5>
    <p>
      Returns <code>true</code> if the value of this BigNumber is negative,
      otherwise returns <code>false</code>.<br />
    </p>
    <pre>
x = new BigNumber(-0)
x.isNegative()                // true
y = new BigNumber(2)
y.isNeg                       // false</pre>
    <p>
      Note: <code>n &lt; 0</code> can be used if
      <code>n &lt;= -Numbe